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I have big records to copy values from table B to table A. Currently I use:
UPDATE table_a, table_b
SET
table_a.column_a = table_b.column_a,
table_a.column_b = table_b.column_b,
table_a.column_c = table_b.column_c,
table_a.column_d = table_b.column_d,
table_a.column_z = table_b.column_z
WHERE
table_a.column_uid = table_b.column_uid
Current update statement is taking too long to execute because I’m on a notebook. Slow machine.
May I know other way to update these values?
First: be sure that table A and B both have primary keys or indexes on the column id fields.