MySQL去除表、字段注释

MySQL去除表、字段注释

1、拼接去除表注释的语句,得到语句后执行

# 根据实际情况，修改database_name
SELECT
CONCAT('ALTER TABLE ',table_name," COMMENT = '';")
FROM information_schema.TABLES
WHERE table_type='BASE TABLE' 
AND TABLE_SCHEMA='database_name';

2、拼接去除字段的语句，得到语句后执行

# 根据实际情况，修改database_name
SELECT
	concat(
		'alter table ',
		table_schema,
		'.',
		table_name,
		' modify column `',
		column_name,
		'` ',
		column_type,
		' ',
	IF
		( is_nullable = 'YES', IF ( data_type IN ( 'timestamp' ), ' null ', ' ' ), 'not null ' ),
	IF
		(
			column_default IS NULL,
			'',
		IF
			(
				data_type IN ( 'char', 'varchar' ) 
				OR data_type IN ( 'date', 'datetime' ) 
				AND column_default != 'CURRENT_TIMESTAMP',
				concat( ' default ''', column_default, '''' ),
				concat( ' default ', IF ( column_default = '', '''''', column_default ) ) 
			) 
		),
	IF
		( extra IS NULL OR extra = '', '', concat( ' ', extra ) ),
		' comment ''',
		''';' 
) s 
FROM
	information_schema.COLUMNS 
WHERE
	table_schema = 'database_name'

小尾巴~~

只要有积累，就会有进步