MySQL arrange existing table columns

Question

How can I change the position of a certain existing column in MySQL table?

Ex: I want to move the column username from its current position to

Answer 1

Your SQL should look like this:

ALTER TABLE `Customers` MODIFY `UserName` INT (11) AFTER `Orders`

Done! One line changes position and there's nothing else to do.

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I advise against @rahim-asgari recommendation of ALTER TABLE MYTABLE ADD MYFILED INT( 5 ) NOT NULL AFTER POSITION, since you'll to:

1. Add a new field
2. Copy old field's data into the new field
3. Modify any constraints/Indexes
4. Delete old field

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Syntax:

ALTER TABLE `TableName` MODIFY `FieldToBeMoved` [SAME FIELD SETTINGS] [ACTION] `TargetPosition`

• [SAME FIELD SETTINGS]
  Refers to the configuration of your field. TINYINT, VARCHAR, TEXT, etc. Remember to include the size. Ej. varchar (255)

• [ACTION]
  You can move a field BEFORE or AFTER a specific field.
  Replace for BEFORE or AFTER accordingly.

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EXAMPLE

If your...

• Table name: Customers
• Field to move: UserName
• UserName settings: int(11)
• Target Position (Last field of the table): Orders