如果我有两张这样的表:
-- -----------------------------------------------------
-- Table `mydb77`.`supplier`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb77`.`supplier` (
`sp_id` INT(11) NOT NULL AUTO_INCREMENT,
`sp_company` VARCHAR(45) NULL DEFAULT NULL,
`sp_location` VARCHAR(45) NULL DEFAULT NULL,
PRIMARY KEY (`sp_id`));
-- -----------------------------------------------------
-- Table `mydb77`.`customer`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb77`.`customer` (
`cu_id` INT(11) NOT NULL AUTO_INCREMENT,
`cu_name` VARCHAR(45) NULL DEFAULT NULL,
`cu_title` VARCHAR(15) NULL DEFAULT NULL,
`cu_location` VARCHAR(45) NULL DEFAULT NULL,
PRIMARY KEY (`cu_id`);
如何获得以下输出:
按名称订购。
表格的列数不同。
答案 0 :(得分:2)
您可以使用union all
执行所需操作:
select 'supplier' as tablename, sp_id as id,
sp_company as name, sp_location as location
from supplier
union all
select 'customer', cu_id, cu_company, cu_location
from customer
order by 3;