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Because of this indeterminacy, referencing other tables only within sub-selects is safer, though often harder to read and slower than using a join. [1] Set the value of column C1 in table T to 1, only in those rows where the value of column C2 is "a".

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This option takes a list of one or more partitions or subpartitions (or both).

Only the partitions (or subpartitions) listed are checked for matches, and a row that is not in any of these partitions or subpartitions is not updated, whether it satisfies the clause, are flagged as unsafe for statement-based replication.

In some databases, such as Postgre SQL, when a FROM clause is present, what essentially happens is that the target table is joined to the tables mentioned in the fromlist, and each output row of the join represents an update operation for the target table.

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The same as race, I only got the 7 and 9 in race columns, but missing 1 and 2 original rows in the updated table. New Value Else employee Table.first Name End, lastname = CASE When(employee Table.lastname='N' and ID=20) THEN Value Table.New Value Else employee Table.lastname End, address = CASE When(employee Table.address ='N' and ID=30) THEN Value Table.If you access a column from the table to be updated in an expression, assignments are generally evaluated from left to right.For multiple-table updates, there is no guarantee that assignments are carried out in any particular order.This is a community of tens of thousands of software programmers and website developers including Wrox book authors and readers. By joining today you can post your own programming questions, respond to other developers questions, and eliminate the ads that are displayed to guests. Hii Alll Is it possible to update multiple column based on case statement??