草稿
SELECT
`a`.`f_qtn_uuid` AS `f_qtn_uuid`,
`a`.`f_qtn_no` AS `f_qtn_no`,
`a`.`f_qtn_date` AS `f_qtn_date`,
( CASE `a`.`f_chk_flag` WHEN 1 THEN CONVERT ( '√' USING utf8mb4 ) ELSE '' END ) AS `f_chk_flag`,
( CASE `a`.`f_sal_flag` WHEN 1 THEN CONVERT ( '√' USING utf8mb4 ) ELSE '' END ) AS `f_sal_flag`,
FROM
`bu_qtnmas` `a`
LEFT JOIN `ve_empmasin` `b` ON `b`.`f_emp_no` = `a`.`f_operator`
修改某个表字段为自增
ALTER TABLE small_category MODIFY COLUMN id INT(11) auto_increment;