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MySQL update column from table B to table A

原文 2012-03-28 17:19:13 8 1 mysql/ sql

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?

1 answers

首先：确保表A和B在列ID字段上都具有主键或索引。

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