SELECTTOP10column1,column2FROMtable_name; 1. 2. 上述示例中,我们查询了名为table_name的表中的前10行数据,并只返回了column1和column2两列。你可以根据需要更改数字10来指定返回的行数。 使用FETCH FIRST…ROWS ONLY语句 从SQL Server 2012开始,引入了FETCH FIRST…ROWS ONLY语句,它也可以用于查询指定行数。...
In SQL, the LIMIT clause allows us to restrict the number of rows that are returned from a given SQL query. For example, in a select statement, instead of returning all the rows from the table which may contain over 1000 records, we can choose to view only the first 10 rows. The fol...
DELETE FROM Production.WorkOrderRouting WHERE WorkOrderID = @WorkOrderID; -- Delete the rows from the parent table, WorkOrder, for the specified work order. DELETE FROM Production.WorkOrder WHERE WorkOrderID = @WorkOrderID; COMMIT END TRY BEGIN CATCH -- Determine if an error occurred. IF @@TRA...
Query OK, 0 rows affected (0.00 sec) MySQL> show variables like 'slow%'; +---+---+ | Variable_name | Value | +---+---+ | slow_launch_time | 2 | | slow_query_log | ON | 注:是否打开日志记录 | slow_query_log_file | /tmp/slow.log | 注: 设置到什么位置 +---+---+ ...
DROP PROCEDURE IF EXISTS sp_RepairEmployeeRecord; GO CREATE PROCEDURE sp_RepairEmployeeRecord @EmployeeID INT, @versionNumber INT = 1 AS WITH History AS ( /* Order historical rows by their age in DESC order*/ SELECT ROW_NUMBER() OVER (PARTITION BY EmployeeID ORDER BY [ValidTo] DESC) ...
Show 5 more Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) SQL analytics endpoint in Microsoft Fabric Warehouse in Microsoft Fabric SQL database in Microsoft Fabric Limits the rows returned in a query result set to a...
大家好,又见面了,我是你们的朋友全栈君。 SQL语句大全 –语 句功能 –数据操作 SELECT –从数据库表中检索数据行和列 INSERT –向数据库表添加新数据行 DELETE –从数据库表中删除数据行 UPDATE –更新数据库表中的数据 -数据定义 CREATE TABLE –创建一个数据库表 DROP TABLE –从数据库中删除表 ALTER TAB...
Use the @@ROWCOUNT function to return the number of inserted rows to the client application. For more information, see @@ROWCOUNT (Transact-SQL).Variable names can be used in UPDATE statements to show the old and new values affected, but this should be used only when the UPDATE statement ...
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(6)SELECT [DISTINCT | ALL] col1, col2, agg_func(col3) AS alias(1) FROM t1 JOIN t2(2) ON (join_conditions)(3) WHERE where_conditions(4) GROUP BY col1, col2(5)HAVING having_condition(7) UNION [ALL] ...(8) ORDER BY col1 ASC,col2 DESC(9)OFFSET m ROWS FETCH NEXT num_ro...