It is possible to Simulate a MySQL query before running it with the use of  MySQL-Transactions and the build in ROLLBACK-Feature of MySQL: For example: START TRANSACTION; SELECT * FROM nicetable WHERE somthing=1; UPDATE nicetable SET nicefield=’VALUE’ WHERE somthing=1; SELECT * FROM nicetable WHERE somthing=1; #check COMMIT; # or if you want to reset changes ROLLBACK; […]