-- 验证备份文件是否可读 RESTORE VERIFYONLY FROM DISK = 'D:\Backup\School_2025_Xiaqiuchu_Full.bak'; 查看备份历史 -- 查询备份历史记录 SELECT database_name, backup_start_date, type, -- D=完整, I=差异, L=日志 physical_device_name FROM msdb.dbo.backupset bs JOIN msdb.dbo.backupmediafamil...
INSERTINTOtablename select_statement 更新记录 UPDATEtablenameSET{colname=value}[, ...] [WHEREcondition1 [AND|ORcondition2][...]] 或: UPDATEtablename[, ...]SET{[tablename.]colname=value}[, ...] [WHEREcondition1 [AND|ORcondition2][...]] 删除记录 DELETEFROMtablename [WHEREcondition1 ...
Considering the database above, use SQL language to write the following queries. Solution Q1. Find the department names of all instructors 代码语言:javascript 代码运行次数:0 运行 AI代码解释 select distinct dept_name from instructor; Q2. Find the names of all instructors in the Computer Science ...
This name should be unique among all the Database_Directory names in the SQL Server instance. Uniqueness comparison is case-insensitive, regardless of SQL Server collation settings. This option should be set before you create a FileTable in this database. The following options are allowable only...
稍后我们将详细介绍表达式和内置函数,本例是想让你大致了解select子句中可以包含哪些内容。如果你只需要执行内置函数或计算简单表达式,可以完全跳过from子句。举个例子: mysql> SELECT version(), -> user(), -> database(); +---+---+---+ | version() | user() | database() | +---+---+---+...
table.CREATETABLE[dbo].[myTable]WITH( CLUSTERED COLUMNSTOREINDEX, DISTRIBUTION = ROUND_ROBIN )ASSELECT*FROM[dbo].[DimSalesTerritory];-- Switch table namesRENAMEOBJECT[dbo].[DimSalesTerritory]to[DimSalesTerritory_old];RENAMEOBJECT[dbo].[myTable]TO[...
CREATE TABLE new_table; SELECT SELECT col, col2, col3 INTO new_table FROM existing_table; 在第一个语句中,数据库使用 CREATE TABLE 语句中指定的名创建一个新表。新表的结构由 SELECT 语句的结果集定义。然后,数据库将 SELECT 语句的结果填充到新表中。 尽管上述的过程可以完美地复制表,但是有一种更...
使用SELECT 语句可以读取表中的数据。 SELECT 语句是最重要的 Transact-SQL 语句之一,其语法有许多变体。 在本教程中,你将使用五个基础版本。 读取表中的数据 键入并执行以下语句以读取Products表中的数据。 SQL -- The basic syntax for reading data from a single tableSELECTProductID, ProductName, Price, ...
"explicit value must be specified for identity column in table" error in SQL 2000 "FROM clause have the same exposed names. Use correlation names to distinguish them" "No transaction is active." error when trying to send a transactional SQL statment over MSDTC "Restricted data type attr...
SELECT[Id],[Name],[Price],[CreateTime],[CustomId]FROM[Order]WHERE( ([Name]like'%'+CAST(@MethodConst0ASNVARCHAR(MAX))+'%')OR([Name]like'%'+CAST(@MethodConst1ASNVARCHAR(MAX))+'%') ) Feature5 : Multi-tenant transaction //Creaate database objectSqlSugarClient db =newSqlSugarClient(ne...