I don’t believe MySQL supports dynamic sql. You can do “prepared” statements which is similar, but different.
Here is an example:
mysql> PREPARE stmt FROM -> 'select count(*) -> from information_schema.schemata -> where schema_name = ? or schema_name = ?' ; Query OK, 0 rows affected (0.00 sec) Statement prepared mysql> EXECUTE stmt -> USING @schema1,@schema2 +----------+ | count(*) | +----------+ | 2 | +----------+ 1 row in set (0.00 sec) mysql> DEALLOCATE PREPARE stmt;
The prepared statements are often used to see an execution plan for a given query. Since they are executed with the execute command and the sql can be assigned to a variable you can approximate the some of the same behavior as dynamic sql.
Here is a good link about this:
Don’t forget to deallocate the stmt
using the last line!
Good Luck!
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