add column to all tables after first column mysql

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Pietro
14 Mar 2016
1-- ALTER TABLE tbl_name ADD COLUMN column_name column_definition 
2--		[FIRST|AFTER existing_column];
3ALTER TABLE office ADD COLUMN phone VARCHAR(200) DEFAULT '000' AFTER name;
4ALTER TABLE office ADD COLUMN flag INT(1) FIRST;
5ALTER TABLE office ADD COLUMN last_col INT(2);	-- Last column is default position
6-- ↓ Test it (Fiddle)
Carlos
29 Jan 2021
1SELECT CONCAT('ALTER TABLE ', table_schema,'.', TABLE_NAME,' ADD COLUMN `hash` VARCHAR(50) NULL DEFAULT UUID() AFTER ', first_column, ';') AS ddl
2
3FROM (
4
5	SELECT
6		(
7			SELECT `COLUMN_NAME`
8			FROM `INFORMATION_SCHEMA`.`COLUMNS`
9			WHERE `TABLE_SCHEMA`=t.TABLE_SCHEMA AND `TABLE_NAME`=t.TABLE_NAME
10			LIMIT 1
11		) AS 'first_column',
12		t.*
13	FROM
14	information_schema.tables t
15	WHERE table_schema = 'your_table_name' AND table_type = 'base table'
16	
17) AS x;
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