CREATEPROCEDUREpr_Names @VarPrice moneyASBEGIN-- The print statement returns text to the userPRINT'Products less than '+CAST(@VarPriceASvarchar(10));-- A second statement starts hereSELECTProductName, PriceFROMvw_NamesWHEREPrice < @VarPrice;ENDGO ...
BEGIN TRANSACTION; -- This SELECT statement will acquire an IS lock on the table. SELECT col1 FROM TestTable WITH (HOLDLOCK); 会话2: 启动事务,在此事务下运行 SELECT 语句将获取共享 (S) 锁并将其保留在表中。 将获取所有分区的 S 锁,这将产生多个表锁,每个分区一个。 例如,在具有 16 个 CPU...
SELECT[name], [value], [value_in_use]FROMsys.configurationsWHERE[name] ='max server memory (MB)'OR[name] ='min server memory (MB)'; 使用SQL Server Management Studio 使用“最小服务器内存(MB)”和“最大服务器内存(MB)”重新配置由 SQL Server 内存管理器为 SQL Server 实例管理的内存量 (MB...
USEmaster; GO-- Get the SQL Server data path.DECLARE@data_pathnvarchar(256);SET@data_path = (SELECTSUBSTRING(physical_name,1,CHARINDEX(N'master.mdf',LOWER(physical_name)) -1)FROMmaster.sys.master_filesWHEREdatabase_id =1ANDfile_id =1);-- Execute the CREATE DATABASE statement.EXECUTE('...
CREATE TABLE #Test (C1 NVARCHAR(10), C2 NVARCHAR(50), C3 DATETIME); GO CREATE UNIQUE INDEX AK_Index ON #Test (C2) WITH (IGNORE_DUP_KEY = ON); GO INSERT INTO #Test VALUES (N'OC', N'Ounces', GETDATE()); INSERT INTO #Test SELECT * FROM Production.UnitMeasure; GO SELECT COUNT(...
查询计划显示在StatementOptmEarlyAbortReason="TimeOut"XML 查询计划中。 XML <?xml version="1.0" encoding="utf-16"?><ShowPlanXMLxmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:xsd="http://www.w3.org/2001/XMLSchema"Version="1.518"Build="13.0.5201.2"xmlns="http:...
Example Return all the columns from the Customers table: SELECT * FROM Customers; Try it Yourself » Exercise? What is the purpose of the SQL SELECT statement? To insert data into a database To select data from a database To delete data from a database To update data in a database...
SQL SELECT Statement Syntax SELECT column(s) FROM table_name(s) WHERE conditions; SQL SELECT Statement Examples Suppose we have a table named “Employee” with the data as shown below. Now we will see what the SQL SELECT Statement does when used in different scenarios ...
SELECT is usually the first word in an SQL statement. Most SQL statements are either SELECT orSELECT…INTOstatements. The minimum syntax for a SELECT statement is: SELECTfieldsFROMtable You can use an asterisk (*) to select all fields in a table. The following example select...
{ [ BEGIN ] sql_statement[;] [ ...n] [ END ] } 构成过程主体的一个或多个 Transact-SQL 语句。 您可以使用可选的 BEGIN 和 END 关键字将这些语句括起来。 有关详细信息,请参阅CREATE PROCEDURE (Transact-SQL)中的“最佳做法”、“一般备注”以及“限制和局限”部分。