联合结果集 新建临时工数据表 复制代码 代码如下: CREATE TABLE T_TempEmployee (FIdCardNumber VARCHAR(20),FName VARCHAR(20),FAge int,PRIMARY KEY(FIdCardNumber)); INSERT INTO T_TempEmployee(FIdCardNumber,FName,FAge) VALUES('
联合结果集 新建临时工数据表 复制代码 代码如下: CREATE TABLE T_TempEmployee (FIdCardNumber VARCHAR(20),FName VARCHAR(20),FAge int,PRIMARY KEY(FIdCardNumber)); INSERT INTO T_TempEmployee(FIdCardNumber,FName,FAge) VALUES('1234567890121','Sarani',33); INSERT INTO T_TempEmployee(FIdCardNumber,FName,FAge) VALUES('1234567890122','Tom',26); INSERT INTO T_TempEmployee(FIdCardNumber,FName,FAge) VALUES('1234567890123','Yalaha',38); INSERT INTO T_TempEmployee(FIdCardNumber,FName,FAge) VALUES('1234567890124','Tina',26); INSERT INTO T_TempEmployee(FIdCardNumber,FName,FAge) VALUES('1234567890125','Konkaya',29); INSERT INTO T_TempEmployee(FIdCardNumber,FName,FAge) VALUES('1234567890126','Fotifa',46); Union联合 复制代码 代码如下: select FNumber,FAge from T_Employee union select FIdCardNumber,FAge from T_TempEmployee union上下的查询个数和类型必须对应一致 复制代码 代码如下: select FNumber,FAge,FDepartment from T_Employee union select FIdCardNumber,FAge ,'临时工，无部门' from T_TempEmployee union默认将重复数据去掉。如果不让他去掉，则用union all 复制代码 代码如下: select FName from T_Employee union all select FName from T_TempEmployee
