What is the command sequence for replacing values in table a with values in table b?
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If the two tables are identical, and you want to completely replace contents of table a with table b, you could write a simple procedure to do the following steps:
- DELETE or TRUNCATE table A
- INSERT INTO table A SELECT * FROM table B
CREATE TABLE A as SELECT * FROM table B ;If you don't want to simply replace the entire contents, but want to match like rows and update, then you can write a statement or procedure to:
- Match all the rows of table B to their associated row (by key value) in table A
- When a match is found, replace the column values in table A with the values in table B
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