WHERE id = 1234; 此查询将更新 ID 为 1234 的“students”表中行的“major”和“gpa”列。UPDATE 语句指定我们要更新的表的名称,然后是 SET 关键字和列表,以及要更新的列值对。然后,我们使用 WHERE 子句指定要更新的行。在本例中,我们想要更新 ID 为 1234 的行,因此我们指定“WHERE id = 1234”。 执行...
DELETE FROM table_name WHERE column_name = value; 在上述语法中: DELETE FROM用于指定要删除的表的名称。 WHERE 用于指定删除行的条件。在这里,我们需要提供一个列名称和相应的值。只有满足该条件的行才会被删除。 例如,下面的SQL语句将删除表“students”中ID为1的行: DELETE FROM students WHERE id = 1...
DELETE FROM TempEmployees DELETE TempEmployees 以下示例从Employees表中删除员工编号234: DELETE FROM Employees WHERE EmpId = 234 下面的示例从ActiveEmployees表中删除CurStatus列设置为“RETIRED”的所有行: DELETE FROM ActiveEmployees WHERE CurStatus = 'Retired' 下面的示例使用子查询删除行: DELETE FROM (SELEC...
DELETE FROM TempEmployees 1. DELETE TempEmployees 1. 以下示例从Employees表中删除员工编号234: DELETE FROM Employees WHERE EmpId = 234 1. 2. 3. 下面的示例从ActiveEmployees表中删除CurStatus列设置为“RETIRED”的所有行: DELETE FROM ActiveEmployees WHERE CurStatus = 'Retired' 1. 2. 下面的示例使用...
按s#进行分组排序,row_number()表示s#相同情况下也进行排序,详细用法可以百度,谢谢 1.2删除重复的记录 with ab as( select * from (select s#,row_number() over(partition by s# order by s#) as id from Student ) a where id>1) delete from ab ...
delete from employee where emp_id = ’10031011’ (2) 删除多条记录 例11-6 删除所有的部门信息记录 use pangu delete from department_info /* 或使用 delete department_info */ 这个例子删除了department_info 表中的所有数据使它成为空表 (3) 带子查询的删除语句 ...
)asttwheretest.id>tt.id and test.name=tt.name )-- --sql server方法--- --查询select*from(selectROW_NUMBER() over(partition by name order by id ) row,id,namefromtest ) twheret.row>1--删除 deletefromtestwhereexists(select*from(selectROW_NUMBER() over(partition by name order by id ...
DELETE FROM EMPLOYEES WHERE BRANCH_OFFICE = 'Los Angeles';如同UPDATE语句中一样，省略WHERE子句将使得操作施加到表中所有的行。DELETE语句的语法流图如下面所示：DELETE FROM table [WHERE predicate [ { logical-connector predicate} ] ];语法：delete from 表名 where 字段名 = 值 根据字段名找到值的...
DELETEFROM testWHERE seq_id in(SELECT seq_idFROM(SELECT*FROM(SELECT ROW_NUMBER()OVER w AS row...
1288 - The target table a of the DELETE is not updatable, Time: 0.007000s 原因同上,同样的我们换个方式处理一下。给窗口指定别名:WINDOW w AS (PARTITION BY 字段1 ORDER BY 字段2) 3、最终处理sql: DELETEFROMtestWHEREseq_idin(SELECTseq_idFROM(SELECT*FROM(SELECTROW_NUMBER()OVERwASrow_num,seq_...