可以的，具体语法如下 SELECT [学号][班级]FROM [学生表] AS a INNER JOIN [班级表] AS b ON a.[班级ID] = b.[班级ID]WHERE a.[学号] = 200401
INNER JOIN 连接两个数据表的用法: SELECT * FROM 表1 INNER JOIN 表2 ON 表1.字段号=表2.字段号 INNER JOIN 连接三个数据表的用法: SELECT * FROM (表1 INNER JOIN 表2 ON 表1.字段号=表2.字段号) INNER JOIN 表3 ON 表1.字段号=表3.字段号 INNER JOIN 连接四个数据表的用法: SELECT * FRO...
如果按照常规的实现,就会先用select语句从table2中统计好数值,然后再写一个update语句更新到table1中,更新语句还得循环。这个过程还有很多问题,例如如果更新语句中,有些成功,有些失败,这时怎么处理,这是比较难搞的问题。 可以如下实现: 执行完成之后,table1中的total字段的值就会被改成2和4。 其实就是update可...
select * from table1 left join table2 on (table1.size = table2.size and table2.name = 'AAA') 1. 执行结果: 结论:以上结果的关键原因就是left join、right join,full join的特殊性,不管on上的条件是否为真都会返回left或right表中的记录,full则具有left和right的特性的并集,而inner join 没这个特性...
Table 1:GameScores Table 2:Departments The joining Condition will beDepartmentIdof both tables. SQL statement : SELECTPlayerName, DepartmentName FROMGameScores2INNER JOINDepartments ONGameScores2.DepartmentId = Departments.DepartmentId Result:
SQL里select...where能与inner join 可以一起用，解决方法如下：1、首先创建一个临时表，用于sqlserver语法中的INNER JOIN使用。2、创建另外一个临时表，用于演示sqlserver语法中的INNER JOIN使用。3、往临时表中插入几行测试数据，其中包括插入Null值。4、查询临时表中的测试数据select * from #tmp1;...
SELECTOID,DATE,AMOUNT,EMPLOYEE_NAMEFROMCUSTOMERSINNERJOINORDERSONCUSTOMERS.ID=ORDERS.CUSTOMER_IDINNERJOINEMPLOYEEONORDERS.OID=EMPLOYEE.EID; Output The result of the inner join query above is shown as follows − OIDDATEAMOUNTEMPLOYEE_NAME 1022009-10-08 00:00:003000.00SARIKA ...
The following SQL statement selects all orders with customer and shipper information:Example SELECT Orders.OrderID, Customers.CustomerName, Shippers.ShipperNameFROM ((OrdersINNER JOIN Customers ON Orders.CustomerID = Customers.CustomerID) INNER JOIN Shippers ON Orders.ShipperID = Shippers.ShipperID); ...
create table t1(id int,score int,sex int)create table t2(id1 int,id2 int,dscore int)insert into t1 values (1,5,1)insert into t1 values (2,4,0)insert into t1 values (3,7,1)insert into t2 values (1,2,1)insert into t2 values (2,3,2)执行 select c.id1,a.sex ...
SQL INNER JOIN The SQLINNER JOINstatement joins two tables based on a common column and selects rows that have matching values in these columns. Example -- join Customers and Orders tables with their matching fields customer_idSELECTCustomers.customer_id, Orders.itemFROMCustomersINNERJOINOrdersON...