To save time and because it’s not that smart to repeatedly retype the same things multiple times, you can user custom variables in MySQL like that: SET @store := 1, @name_id := 71, @short_desc_id := 72, @desc_id := 73; SELECT CPE.sku AS sku, CPEVN.value AS name, CPEVSD.value AS short_description, CPEVD.value AS description FROM catalog_product_entity AS […]
From time to time I stumbled over the case, that I had to drop all tables from a MySQL database. In phpMyAdmin or other GUI-based tools – in general – you only have the possibility to drop the whole database. But then you have to recreate it from the scratch.  Or you have to click-drop each table […]
This little tutorial shows how to dump wildcard selected tables from a MySQL database. That’s useful if you don’t want to dump the whole database. Background Recently I had to export a few selected tables from a very huge database. For that I could have run a query like that to export only the required […]
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; […]
To check and optimize tables of a MySQL database: $> mysqlcheck -os <db_name> -u<username> -p To achieve the same for all databases of the respective MySQL server you can run the following command: $> mysqlcheck -Aos -u<username> -p Further information about check and optimize tables in MySQL To get a few more facts about how […]
