Updating multiple tables in pl sql


13-Mar-2018 09:17

What is the SQL update syntax to update more than one column?

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When the subquery fails to find a matching row in tbl B, the subquery returns NULL.

But Sales Supplier, Purchase supplier, Wholesale Supplier ..many other columns how can i update in single SQL ( I have to update around 70 columns and some columns may have null values such as Purchase supplier ..) 2. You need to have the table you are updating from have a unique or primary key constraint. Consequently, to prevent this, you might do this: One potential issue may arise when the subquery actually finds more than one matching row in tbl B.



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