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David Instructs Solomon…3And keep the charge of the LORD your God to walk in His ways and to keep His statutes, commandments, ordinances, and decrees, as is written in the Law of Moses, so that you may prosper in all you do and wherever you turn, 45Moreover, you know what Joab son of Zeruiah did to me—what he did to Abner son of Ner and Amasa son of Jether, the two commanders of the armies of Israel. He killed them in peacetime to avenge the blood of war. He stained with the blood of war the belt around his waist and the sandals on his feet.…
Berean Study Bible · Download
2 Samuel 7:12
And when your days are fulfilled and you rest with your fathers, I will raise up your offspring after you, who will come from your own body, and I will establish his kingdom.
2 Samuel 7:13
He will build a house for My name, and I will establish the throne of his kingdom forever.
2 Samuel 7:25
And now, O LORD God, confirm forever the word You have spoken concerning Your servant and his house. Do as You have promised,
1 Kings 8:25
Therefore now, O LORD, God of Israel, keep for Your servant, my father David, what You promised when You said: 'You will never fail to have a man to sit before Me on the throne of Israel, if only your descendants guard their way to walk before Me as you have done.'
1 Kings 9:5
then I will establish your royal throne over Israel forever, as I promised your father David when I said, 'You will never fail to have a man on the throne of Israel.'
2 Kings 20:3
'Please, O LORD, remember how I have walked before You faithfully and with wholehearted devotion; I have done what is good in Your sight.' And Hezekiah wept bitterly.
2 Chronicles 6:16
Therefore now, O LORD, God of Israel, keep for Your servant, my father David, what You promised when You said: 'You will never fail to have a man to sit before Me on the throne of Israel, if only your descendants guard their way to walk in My Law as you have walked before Me.'
2 Chronicles 7:18
then I will establish your royal throne, as I covenanted with your father David when I said, 'You will never fail to have a man to rule over Israel.'
Psalm 39:1
I said, 'I will watch my ways so that I will not sin with my tongue; I will guard my mouth with a muzzle as long as the wicked are present.'
Psalm 89:29
I will establish his line forever, his throne as long as the heavens endure.
Psalm 119:9
How can a young man keep his way pure? By guarding it according to Your word.
Psalm 132:12
If your sons keep My covenant and the testimony I will teach them, then their sons will also sit on your throne forever and ever.'
Jeremiah 33:17
For this is what the LORD says: David will never lack a man to sit on the throne of the house of Israel,
And when your days are fulfilled and you rest with your fathers, I will raise up your offspring after you, who will come from your own body, and I will establish his kingdom.
2 Samuel 7:13
He will build a house for My name, and I will establish the throne of his kingdom forever.
2 Samuel 7:25
And now, O LORD God, confirm forever the word You have spoken concerning Your servant and his house. Do as You have promised,
1 Kings 8:25
Therefore now, O LORD, God of Israel, keep for Your servant, my father David, what You promised when You said: 'You will never fail to have a man to sit before Me on the throne of Israel, if only your descendants guard their way to walk before Me as you have done.'
1 Kings 9:5
then I will establish your royal throne over Israel forever, as I promised your father David when I said, 'You will never fail to have a man on the throne of Israel.'
2 Kings 20:3
'Please, O LORD, remember how I have walked before You faithfully and with wholehearted devotion; I have done what is good in Your sight.' And Hezekiah wept bitterly.
2 Chronicles 6:16
Therefore now, O LORD, God of Israel, keep for Your servant, my father David, what You promised when You said: 'You will never fail to have a man to sit before Me on the throne of Israel, if only your descendants guard their way to walk in My Law as you have walked before Me.'
2 Chronicles 7:18
then I will establish your royal throne, as I covenanted with your father David when I said, 'You will never fail to have a man to rule over Israel.'
Psalm 39:1
I said, 'I will watch my ways so that I will not sin with my tongue; I will guard my mouth with a muzzle as long as the wicked are present.'
Psalm 89:29
I will establish his line forever, his throne as long as the heavens endure.
Psalm 119:9
How can a young man keep his way pure? By guarding it according to Your word.
Psalm 132:12
If your sons keep My covenant and the testimony I will teach them, then their sons will also sit on your throne forever and ever.'
Jeremiah 33:17
For this is what the LORD says: David will never lack a man to sit on the throne of the house of Israel,
That the LORD may continue his word which he spoke concerning me, saying, If your children take heed to their way, to walk before me in truth with all their heart and with all their soul, there shall not fail you (said he) a man on the throne of Israel.
That the Lord
Genesis 18:19
For I know him, that he will command his children and his household after him, and they shall keep the way of the LORD, to do justice and judgment; that the LORD may bring upon Abraham that which he hath spoken of him.
For I know him, that he will command his children and his household after him, and they shall keep the way of the LORD, to do justice and judgment; that the LORD may bring upon Abraham that which he hath spoken of him.
Deuteronomy 7:12
Wherefore it shall come to pass, if ye hearken to these judgments, and keep, and do them, that the LORD thy God shall keep unto thee the covenant and the mercy which he sware unto thy fathers:
Wherefore it shall come to pass, if ye hearken to these judgments, and keep, and do them, that the LORD thy God shall keep unto thee the covenant and the mercy which he sware unto thy fathers:
Keep It Handy Dehumidifier 2 In 1 450ml
1 Chronicles 28:9
And thou, Solomon my son, know thou the God of thy father, and serve him with a perfect heart and with a willing mind: for the LORD searcheth all hearts, and understandeth all the imaginations of the thoughts: if thou seek him, he will be found of thee; but if thou forsake him, he will cast thee off for ever.
And thou, Solomon my son, know thou the God of thy father, and serve him with a perfect heart and with a willing mind: for the LORD searcheth all hearts, and understandeth all the imaginations of the thoughts: if thou seek him, he will be found of thee; but if thou forsake him, he will cast thee off for ever.
his word
2 Samuel 7:11-16,25
And as since the time that I commanded judges to be over my people Israel, and have caused thee to rest from all thine enemies. Also the LORD telleth thee that he will make thee an house…
And as since the time that I commanded judges to be over my people Israel, and have caused thee to rest from all thine enemies. Also the LORD telleth thee that he will make thee an house…
1 Chronicles 17:11-15
And it shall come to pass, when thy days be expired that thou must go to be with thy fathers, that I will raise up thy seed after thee, which shall be of thy sons; and I will establish his kingdom…
And it shall come to pass, when thy days be expired that thou must go to be with thy fathers, that I will raise up thy seed after thee, which shall be of thy sons; and I will establish his kingdom…
1 Chronicles 22:9-11
Behold, a son shall be born to thee, who shall be a man of rest; and I will give him rest from all his enemies round about: for his name shall be Solomon, and I will give peace and quietness unto Israel in his days…
Behold, a son shall be born to thee, who shall be a man of rest; and I will give him rest from all his enemies round about: for his name shall be Solomon, and I will give peace and quietness unto Israel in his days…
walk
1 Kings 3:3,14
And Solomon loved the LORD, walking in the statutes of David his father: only he sacrificed and burnt incense in high places…
And Solomon loved the LORD, walking in the statutes of David his father: only he sacrificed and burnt incense in high places…
1 Kings 8:23
And he said, LORD God of Israel, there is no God like thee, in heaven above, or on earth beneath, who keepest covenant and mercy with thy servants that walk before thee with all their heart:
And he said, LORD God of Israel, there is no God like thee, in heaven above, or on earth beneath, who keepest covenant and mercy with thy servants that walk before thee with all their heart:
Genesis 17:1
And when Abram was ninety years old and nine, the LORD appeared to Abram, and said unto him, I am the Almighty God; walk before me, and be thou perfect.
And when Abram was ninety years old and nine, the LORD appeared to Abram, and said unto him, I am the Almighty God; walk before me, and be thou perfect.
with all their heart
Deuteronomy 6:5
And thou shalt love the LORD thy God with all thine heart, and with all thy soul, and with all thy might.
And thou shalt love the LORD thy God with all thine heart, and with all thy soul, and with all thy might.
Deuteronomy 10:12
And now, Israel, what doth the LORD thy God require of thee, but to fear the LORD thy God, to walk in all his ways, and to love him, and to serve the LORD thy God with all thy heart and with all thy soul,
And now, Israel, what doth the LORD thy God require of thee, but to fear the LORD thy God, to walk in all his ways, and to love him, and to serve the LORD thy God with all thy heart and with all thy soul,
Deuteronomy 11:13
And it shall come to pass, if ye shall hearken diligently unto my commandments which I command you this day, to love the LORD your God, and to serve him with all your heart and with all your soul,
And it shall come to pass, if ye shall hearken diligently unto my commandments which I command you this day, to love the LORD your God, and to serve him with all your heart and with all your soul,
fail, etc.
1 Kings 8:25
Therefore now, LORD God of Israel, keep with thy servant David my father that thou promisedst him, saying, There shall not fail thee a man in my sight to sit on the throne of Israel; so that thy children take heed to their way, that they walk before me as thou hast walked before me.
Therefore now, LORD God of Israel, keep with thy servant David my father that thou promisedst him, saying, There shall not fail thee a man in my sight to sit on the throne of Israel; so that thy children take heed to their way, that they walk before me as thou hast walked before me.
2 Samuel 7:12,13,16
And when thy days be fulfilled, and thou shalt sleep with thy fathers, I will set up thy seed after thee, which shall proceed out of thy bowels, and I will establish his kingdom…
And when thy days be fulfilled, and thou shalt sleep with thy fathers, I will set up thy seed after thee, which shall proceed out of thy bowels, and I will establish his kingdom…
Psalm 37:9,22
For evildoers shall be cut off: but those that wait upon the LORD, they shall inherit the earth…
For evildoers shall be cut off: but those that wait upon the LORD, they shall inherit the earth…
Dimensions in data management and data warehousing contain relatively static data about such entities as geographical locations, customers, or products. Data captured by Slowly Changing Dimensions (SCDs) change slowly but unpredictably, rather than according to a regular schedule.[1]
Some scenarios can cause referential integrity problems.
For example, a database may contain a fact table that stores sales records. This fact table would be linked to dimensions by means of foreign keys. One of these dimensions may contain data about the company's salespeople: e.g., the regional offices in which they work. However, the salespeople are sometimes transferred from one regional office to another. For historical sales reporting purposes it may be necessary to keep a record of the fact that a particular sales person had been assigned to a particular regional office at an earlier date, whereas that sales person is now assigned to a different regional office.[clarification needed]
Dealing with these issues involves SCD management methodologies referred to as Type 0 through 6. Type 6 SCDs are also sometimes called Hybrid SCDs.
Type 0: retain original[edit]
The Type 0 dimension attributes never change and are assigned to attributes that have durable values or are described as 'Original'. Examples: Date of Birth, Original Credit Score. Type 0 applies to most Date Dimension attributes.[2]
Type 1: overwrite[edit]
This method overwrites old with new data, and therefore does not track historical data.
Example of a supplier table:
Supplier_Key | Supplier_Code | Supplier_Name | Supplier_State |
---|---|---|---|
123 | ABC | Acme Supply Co | CA |
In the above example, Supplier_Code is the natural key and Supplier_Key is a surrogate key. Technically, the surrogate key is not necessary, since the row will be unique by the natural key (Supplier_Code).
If the supplier relocates the headquarters to Illinois the record would be overwritten:
Supplier_Key | Supplier_Code | Supplier_Name | Supplier_State |
---|---|---|---|
123 | ABC | Acme Supply Co | IL |
The disadvantage of the Type 1 method is that there is no history in the data warehouse. It has the advantage however that it's easy to maintain.
If one has calculated an aggregate table summarizing facts by state, it will need to be recalculated when the Supplier_State is changed.[1]
Type 2: add new row[edit]
This method tracks historical data by creating multiple records for a given natural key in the dimensional tables with separate surrogate keys and/or different version numbers. Unlimited history is preserved for each insert.
For example, if the supplier relocates to Illinois the version numbers will be incremented sequentially:
Supplier_Key | Supplier_Code | Supplier_Name | Supplier_State | Version |
---|---|---|---|---|
123 | ABC | Acme Supply Co | CA | 0 |
124 | ABC | Acme Supply Co | IL | 1 |
Another method is to add 'effective date' columns.
Supplier_Key | Supplier_Code | Supplier_Name | Supplier_State | Start_Date | End_Date |
---|---|---|---|---|---|
123 | ABC | Acme Supply Co | CA | 2000-01-01T00:00:00 | 2004-12-22T00:00:00 |
124 | ABC | Acme Supply Co | IL | 2004-12-22T00:00:00 | NULL |
The Start date/time of the second row is equal to the End date/time of the previous row. The null End_Date in row two indicates the current tuple version. A standardized surrogate high date (e.g. 9999-12-31) may instead be used as an end date, so that the field can be included in an index, and so that null-value substitution is not required when querying.
And a third method uses an effective date and a current flag.
Supplier_Key | Supplier_Code | Supplier_Name | Supplier_State | Effective_Date | Current_Flag |
---|---|---|---|---|---|
123 | ABC | Acme Supply Co | CA | 2000-01-01T00:00:00 | N |
124 | ABC | Acme Supply Co | IL | 2004-12-22T00:00:00 | Y |
The Current_Flag value of 'Y' indicates the current tuple version.
Transactions that reference a particular surrogate key (Supplier_Key) are then permanently bound to the time slices defined by that row of the slowly changing dimension table. An aggregate table summarizing facts by state continues to reflect the historical state, i.e. the state the supplier was in at the time of the transaction; no update is needed. To reference the entity via the natural key, it is necessary to remove the unique constraint making Referential integrity by DBMS impossible.
If there are retroactive changes made to the contents of the dimension, or if new attributes are added to the dimension (for example a Sales_Rep column) which have different effective dates from those already defined, then this can result in the existing transactions needing to be updated to reflect the new situation. This can be an expensive database operation, so Type 2 SCDs are not a good choice if the dimensional model is subject to frequent change.[1]
Type 3: add new attribute[edit]
This method tracks changes using separate columns and preserves limited history. The Type 3 preserves limited history as it is limited to the number of columns designated for storing historical data. The original table structure in Type 1 and Type 2 is the same but Type 3 adds additional columns. In the following example, an additional column has been added to the table to record the supplier's original state - only the previous history is stored.
Supplier_Key | Supplier_Code | Supplier_Name | Original_Supplier_State | Effective_Date | Current_Supplier_State |
---|---|---|---|---|---|
123 | ABC | Acme Supply Co | CA | 2004-12-22T00:00:00 | IL |
This record contains a column for the original state and current state—cannot track the changes if the supplier relocates a second time.
One variation of this is to create the field Previous_Supplier_State instead of Original_Supplier_State which would track only the most recent historical change.[1]
Type 4: add history table[edit]
The Type 4 method is usually referred to as using 'history tables', where one table keeps the current data, and an additional table is used to keep a record of some or all changes. Both the surrogate keys are referenced in the Fact table to enhance query performance.
For the above example, the original table name is Supplier and the history table is Supplier_History.
Supplier_key | Supplier_Code | Supplier_Name | Supplier_State |
---|---|---|---|
124 | ABC | Acme & Johnson Supply Co | IL |
Supplier_key | Supplier_Code | Supplier_Name | Supplier_State | Create_Date |
---|---|---|---|---|
123 | ABC | Acme Supply Co | CA | 2003-06-14T00:00:00 |
124 | ABC | Acme & Johnson Supply Co | IL | 2004-12-22T00:00:00 |
This method resembles how database audit tables and change data capture techniques function.
Type 5[edit]
The type 5 technique builds on the type 4 mini-dimension by embedding a “current profile” mini-dimension key in the base dimension that’s overwritten as a type 1 attribute. This approach, called type 5 because 4 + 1 equals 5, allows the currently-assigned mini-dimension attribute values to be accessed along with the base dimension’s others without linking through a fact table. Logically, we typically represent the base dimension and current mini-dimension profile outrigger as a single table in the presentation layer. The outrigger attributes should have distinct column names, like “Current Income Level,” to differentiate them from attributes in the mini-dimension linked to the fact table. The ETL team must update/overwrite the type 1 mini-dimension reference whenever the current mini-dimension changes over time. If the outrigger approach does not deliver satisfactory query performance, then the mini-dimension attributes could be physically embedded (and updated) in the base dimension.[3]
Type 6: combined approach[edit]
The Type 6 method combines the approaches of types 1, 2 and 3 (1 + 2 + 3 = 6). One possible explanation of the origin of the term was that it was coined by Ralph Kimball during a conversation with Stephen Pace from Kalido[citation needed]. Ralph Kimball calls this method 'Unpredictable Changes with Single-Version Overlay' in The Data Warehouse Toolkit.[1]
The Supplier table starts out with one record for our example supplier:
Supplier_Key | Row_Key | Supplier_Code | Supplier_Name | Current_State | Historical_State | Start_Date | End_Date | Current_Flag |
---|---|---|---|---|---|---|---|---|
123 | 1 | ABC | Acme Supply Co | CA | CA | 2000-01-01T00:00:00 | 9999-12-31T23:59:59 | Y |
The Current_State and the Historical_State are the same. The optional Current_Flag attribute indicates that this is the current or most recent record for this supplier. Focus 1 8 9.
When Acme Supply Company moves to Illinois, we add a new record, as in Type 2 processing, however a row key is included to ensure we have a unique key for each row:
Supplier_Key | Row_Key | Supplier_Code | Supplier_Name | Current_State | Historical_State | Start_Date | End_Date | Current_Flag |
---|---|---|---|---|---|---|---|---|
123 | 1 | ABC | Acme Supply Co | IL | CA | 2000-01-01T00:00:00 | 2004-12-22T00:00:00 | N |
123 | 2 | ABC | Acme Supply Co | IL | IL | 2004-12-22T00:00:00 | 9999-12-31T23:59:59 | Y |
We overwrite the Current_State information in the first record (Row_Key = 1) with the new information, as in Type 1 processing. We create a new record to track the changes, as in Type 2 processing. And we store the history in a second State column (Historical_State), which incorporates Type 3 processing.
For example, if the supplier were to relocate again, we would add another record to the Supplier dimension, and we would overwrite the contents of the Current_State column:
Supplier_Key | Row_Key | Supplier_Code | Supplier_Name | Current_State | Historical_State | Start_Date | End_Date | Current_Flag |
---|---|---|---|---|---|---|---|---|
123 | 1 | ABC | Acme Supply Co | NY | CA | 2000-01-01T00:00:00 | 2004-12-22T00:00:00 | N |
123 | 2 | ABC | Acme Supply Co | NY | IL | 2004-12-22T00:00:00 | 2008-02-04T00:00:00 | N |
123 | 3 | ABC | Acme Supply Co | NY | NY | 2008-02-04T00:00:00 | 9999-12-31T23:59:59 | Y |
Type 2 / type 6 fact implementation[edit]
Type 2 surrogate key with type 3 attribute[edit]
In many Type 2 and Type 6 SCD implementations, the surrogate key from the dimension is put into the fact table in place of the natural key when the fact data is loaded into the data repository.[1] The surrogate key is selected for a given fact record based on its effective date and the Start_Date and End_Date from the dimension table. This allows the fact data to be easily joined to the correct dimension data for the corresponding effective date.
Here is the Supplier table as we created it above using Type 6 Hybrid methodology:
Supplier_Key | Supplier_Code | Supplier_Name | Current_State | Historical_State | Start_Date | End_Date | Current_Flag |
---|---|---|---|---|---|---|---|
123 | ABC | Acme Supply Co | NY | CA | 2000-01-01T00:00:00 | 2004-12-22T00:00:00 | N |
124 | ABC | Acme Supply Co | NY | IL | 2004-12-22T00:00:00 | 2008-02-04T00:00:00 | N |
125 | ABC | Acme Supply Co | NY | NY | 2008-02-04T00:00:00 | 9999-12-31T23:59:59 | Y |
Once the Delivery table contains the correct Supplier_Key, it can easily be joined to the Supplier table using that key. The following SQL retrieves, for each fact record, the current supplier state and the state the supplier was located in at the time of the delivery:
Pure type 6 implementation[edit]
Having a Type 2 surrogate key for each time slice can cause problems if the dimension is subject to change.[1]
A pure Type 6 implementation does not use this, but uses a Surrogate Key for each master data item (e.g. each unique supplier has a single surrogate key).
This avoids any changes in the master data having an impact on the existing transaction data.
It also allows more options when querying the transactions.
Here is the Supplier table using the pure Type 6 methodology:
Supplier_Key | Supplier_Code | Supplier_Name | Supplier_State | Start_Date | End_Date |
---|---|---|---|---|---|
456 | ABC | Acme Supply Co | CA | 2000-01-01T00:00:00 | 2004-12-22T00:00:00 |
456 | ABC | Acme Supply Co | IL | 2004-12-22T00:00:00 | 2008-02-04T00:00:00 |
456 | ABC | Acme Supply Co | NY | 2008-02-04T00:00:00 | 9999-12-31T23:59:59 |
The following example shows how the query must be extended to ensure a single supplier record is retrieved for each transaction.
A fact record with an effective date (Delivery_Date) of August 9, 2001 will be linked to Supplier_Code of ABC, with a Supplier_State of 'CA'. A fact record with an effective date of October 11, 2007 will also be linked to the same Supplier_Code ABC, but with a Supplier_State of 'IL'.
While more complex, there are a number of advantages of this approach, including:
- Referential integrity by DBMS is now possible, but one cannot use Supplier_Code as foreign key on Product table and using Supplier_Key as foreign key each product is tied on specific time slice.
- If there is more than one date on the fact (e.g. Order Date, Delivery Date, Invoice Payment Date) one can choose which date to use for a query.
- You can do 'as at now', 'as at transaction time' or 'as at a point in time' queries by changing the date filter logic.
- You don't need to reprocess the Fact table if there is a change in the dimension table (e.g. adding additional fields retrospectively which change the time slices, or if one makes a mistake in the dates on the dimension table one can correct them easily).
- You can introduce bi-temporal dates in the dimension table.
- You can join the fact to the multiple versions of the dimension table to allow reporting of the same information with different effective dates, in the same query.
The following example shows how a specific date such as '2012-01-01T00:00:00' (which could be the current datetime) can be used.
Both surrogate and natural key[edit]
An alternative implementation is to place both the surrogate key and the natural key into the fact table.[4] This allows the user to select the appropriate dimension records based on:
- the primary effective date on the fact record (above),
- the most recent or current information,
- any other date associated with the fact record.
This method allows more flexible links to the dimension, even if one has used the Type 2 approach instead of Type 6.
Here is the Supplier table as we might have created it using Type 2 methodology:
Supplier_Key | Supplier_Code | Supplier_Name | Supplier_State | Start_Date | End_Date | Current_Flag |
---|---|---|---|---|---|---|
123 | ABC | Acme Supply Co | CA | 2000-01-01T00:00:00 | 2004-12-22T00:00:00 | N |
124 | ABC | Acme Supply Co | IL | 2004-12-22T00:00:00 | 2008-02-04T00:00:00 | N |
125 | ABC | Acme Supply Co | NY | 2008-02-04T00:00:00 | 9999-12-31T23:59:59 | Y |
The following SQL retrieves the most current Supplier_Name and Supplier_State for each fact record:
If there are multiple dates on the fact record, the fact can be joined to the dimension using another date instead of the primary effective date. For instance, the Delivery table might have a primary effective date of Delivery_Date, but might also have an Order_Date associated with each record.
The following SQL retrieves the correct Supplier_Name and Supplier_State for each fact record based on the Order_Date:
Some cautions:
- Referential integrity by DBMS is not possible since there is not a unique key to create the relationship.
- If relationship is made with surrogate to solve problem above then one ends with entity tied to a specific time slice.
- If the join query is not written correctly, it may return duplicate rows and/or give incorrect answers.
- The date comparison might not perform well.
- Some Business Intelligence tools do not handle generating complex joins well.
- The ETL processes needed to create the dimension table needs to be carefully designed to ensure that there are no overlaps in the time periods for each distinct item of reference data.
Combining types[edit]
Keep It 1 2 49
Scd model example
Different SCD Types can be applied to different columns of a table. For example, we can apply Type 1 to the Supplier_Name column and Type 2 to the Supplier_State column of the same table.
See also[edit]
- Entity–attribute–value model - Vertical
Notes[edit]
- ^ abcdefgKimball, Ralph; Ross, Margy. The Data Warehouse Toolkit: The Complete Guide to Dimensional Modeling.
- ^http://www.kimballgroup.com/2013/02/design-tip-152-slowly-changing-dimension-types-0-4-5-6-7/
- ^https://www.kimballgroup.com/2013/02/design-tip-152-slowly-changing-dimension-types-0-4-5-6-7/
- ^Ross, Margy; Kimball, Ralph (March 1, 2005). 'Slowly Changing Dimensions Are Not Always as Easy as 1, 2, 3'. Intelligent Enterprise.
References[edit]
X 1 4 2
- Bruce Ottmann, Chris Angus: Data processing system, US Patent Office, Patent Number 7,003,504. February 21, 2006
- Ralph Kimball:Kimball University: Handling Arbitrary Restatements of History[1]. December 9, 2007
4 4.5 2 1.2 Answer
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