Check if the User Exists SELECT user, host FROM mysql.user WHERE user = ‘your_username’; If the user doesn’t exist, create them first: CREATE USER ‘your_username’@’%’ […]
Remove First Character From A Field In A Database
Assuming we have the following entry in our database: /go/123456 But we require: go/123456 UPDATE `TABLENAME` SET `FIELDNAME` = SUBSTRING(`FIELDNAME`, 2) WHERE `FIELDNAME` LIKE `/%`;
Replace String In Database Field
The following code will replace a string in a database field UPDATE `TableName` SET `DatabaseField` = REPLACE(`DatabaseField`, ‘OldString’, ‘NewString’) WHERE `DatabaseField` LIKE ‘%OldString%’;
Rename SQL Table
If you wish to rename a SQL table use the following code: ALTER TABLE table_name RENAME TO new_table_name;
Add an Index to a MySQL Table
An index speeds up the serving of data by allowing you to quickly find data in a table without having to go row by row […]
Copy MYSQL Table Structure and Import Specific Columns
This code will allow you to copy the table structure from an existing table into a new one and then copy data from specific columns […]
Add A Primary Key To A Table In MYSQL
Run the following code to amend an existing column into a Primary Key ALTER TABLE `wp_posts` ADD PRIMARY KEY (`ID`), MODIFY `ID` bigint(20) UNSIGNED NOT […]
Change Image Filenames In MYSQL (jpg to png)
Create a script (replacing the variables as necessary) and run it to replace ALL instances of (in this case) “star.jpg” to “star.png” <?php // CHANGE […]