How can I call a stored procedure from functions?
How can I find duplicate values in a table?
There are several ways to delete duplicate rows from a table. This is the easiest way of de-duplicating a table, and is at its best with fairly small rowsets, and where all the columns in a table are duplicates. We simply run a SELECT DISTINCT on the offending table, storing the results in a temporary table, then delete the contents of the permanent table and re-populate it from the temporary one. While this may be the simplest way, you may have some space issue if you are working with millions of rows. Derived tables and correlated subqueries can also be used.
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