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[Solved] ERROR 1093 (HY000): You can't specify target table 'xxx' for upda...

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Posted on 7/17/2018 4:15:30 PM | | | |
ERROR 1093 (HY000): You can't specify target table 'xxx' for update in FROM clause
In MySQL, when writing SQL statements, you may encounter errors like You can't specify target table 'table name' for update in FROM clause, which means,You can't select some values in the same table before updating the table (in the same statement), that is, you cannot make a judgment based on the value of a field and then update the value of a field.



Wrong SQL statement:



SELECT the result through the middle table again, so as to avoid errors.

After modification, the correct sql statement:

It should be noted thatThis problem only occurs in MySQL, MSSQL and Oracle do not have this issue.




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