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How Does it Work? If I have tables with the identical data structure that use the same partition scheme, I can move data using partition switching. Table_Staging.

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Presentation on theme: "How Does it Work? If I have tables with the identical data structure that use the same partition scheme, I can move data using partition switching. Table_Staging."— Presentation transcript:

1 How Does it Work? If I have tables with the identical data structure that use the same partition scheme, I can move data using partition switching. Table_Staging 1 2 3 4 5 6 7 Table 1 2 3 4 5 6 7 Table_Delete 1 2 3 4 5 6 7 Contains Data Empty Partition

2 How Does it Work? I can load and modify data in a staging table…
Table_Staging 1 2 3 4 5 6 7 Table 1 2 3 4 5 6 7 Table_Delete 1 2 3 4 5 6 7 Contains Data Empty Partition

3 How Does it Work? …issue a switch command…
Table_Staging 1 2 3 4 5 6 7 Table 1 2 3 4 5 6 7 Table_Delete 1 2 3 4 5 6 7 ALTER TABLE [Table_Staging] SWITCH PARTITION 7 to [Table] PARTITION 7; Contains Data Empty Partition

4 How Does it Work? …and the data will be ‘moved’ instantly.
Table_Staging 1 2 3 4 5 6 7 Table 1 2 3 4 5 6 7 Table_Delete 1 2 3 4 5 6 7 Contains Data Empty Partition

5 How Does it Work. I can only switch data into an empty partition
How Does it Work? I can only switch data into an empty partition. If I stage data that I want to replace existing data with, I need to make room. Table_Staging 1 2 3 4 5 6 7 Table 1 2 3 4 5 6 7 Table_Delete 1 2 3 4 5 6 7 Contains Data Empty Partition

6 How Does it Work? I can switch data out of my primary table…
Table_Staging 1 2 3 4 5 6 7 Table 1 2 3 4 5 6 7 Table_Delete 1 2 3 4 5 6 7 ALTER TABLE [Table] SWITCH PARTITION 1 to [Table_Delete] PARTITION 1; SWITCH PARTITION 2 to [Table_Delete] PARTITION 2; Contains Data Empty Partition

7 How Does it Work? …switch the data from staging to my primary table…
Table_Staging 1 2 3 4 5 6 7 Table 1 2 3 4 5 6 7 Table_Delete 1 2 3 4 5 6 7 ALTER TABLE [Table_Staging] SWITCH PARTITION 1 to [Table] PARTITION 1; SWITCH PARTITION 2 to [Table] PARTITION 2; Contains Data Empty Partition

8 How Does it Work? …and then truncate Table_Delete…
Table_Staging 1 2 3 4 5 6 7 Table 1 2 3 4 5 6 7 Table_Delete 1 2 3 4 5 6 7 TRUNCATE TABLE Table_Delete; Contains Data Empty Partition

9 How Does it Work? …done. Table_Staging 1 2 3 4 5 6 7 Table 1 2 3 4 5 6 7 Table_Delete 1 2 3 4 5 6 7 Contains Data Empty Partition


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