Sign in Version SQL Server 2022 Search Graph JSON Mathematical Logical Metadata Metadata @@PROCID APP_NAME APPLOCK_MODE APPLOCK_TEST ASSEMBLYPROPERTY COL_LENGTH COL_NAME COLUMNPROPERTY DATABASEPROPERTYEX DB_ID DB_NAME FILE_ID FILE_IDEX FILE_NAME ...
1 Schema概念 schema在数据库中表示的是数据库对象集合,它包含了各种对像,比如:表,视图,存储过程,索引等等。 一般一个用户对应一个集合,所以为区分不同集合就需给不同集合起名。用户的schema名就相当于用户名,并作为该用户缺省schema。所以schema集合看上去像用户名。 例如当我们访问一个数据表时,若该表没有指明...
name,'IsIdentity')=1 then '√'else '' end) as 标识, (case when (SELECT count(*) FROM sysobjects--查询主键 WHERE (name in (SELECT name FROM sysindexes WHERE (id = a.id) AND (indid in (SELECT indid FROM sysindexkeys
syntaxsql Copy OBJECT_SCHEMA_NAME ( object_id [, database_id ] ) Arguments object_id The ID of the object to be used. object_id is int and is assumed to be a schema-scoped object in the specified database, or in the current database context. database_id The ID of the databas...
Specify the name of the publication to which the article belongs for @publication and the name of the article for @article. Note the value of the schema_option column in the result set. Execute a & (Bitwise AND) operation using the value from step 1 and the desired schema option value ...
information_schema.STATISTICS 对应于show index from table_name 查看线程 information_schema.PROCESSLIST 对应于 show processlist 二.MySQL 库表简介 在mysql数据库中,有mysql_install_db脚本初始化权限表,存储权限的表有: 1、user表: 用户列、权限列、安全列、资源控制列 ...
“Unable to enlist in the transaction” with Oracle linked server from MS SQL Server [<Name of Missing Index, sysname,>] in non clustered index [Execute SQL Task] Error: The value type (__ComObject) can only be converted to variables of type Object. [ODBC Driver Manager] Data source ...
适用于:SQL Server Azure SQL 数据库 Azure SQL 托管实例 下面的查询返回描述文档结构的 XML-DATA 架构。 示例 SQL 复制 USE AdventureWorks2022; GO SELECT ProductModelID, Name FROM Production.ProductModel WHERE ProductModelID IN (122, 119) FOR XML RAW, XMLDATA; GO 结...
我们格式化一下 SQL: 可以看到 MySQL 将 代码语言:javascript 代码运行次数:0 运行 AI代码解释 selectfromAwhereA.x notin(select xfromB)//非关联子查询 转换成了 代码语言:javascript 代码运行次数:0 运行 AI代码解释 selectfromAwhere notexists(select1fromBwhereB.x=a.x)//关联子查询 ...
SQL Server官方文档指出,schema中包含了数据库的表,字段,数据类型以及主键和外键的名称。 Oracle Database A schema is a collection of logical structures of data, or schema objects. A schema is owned by a database user and has the same name as that user. Each user owns a single schema. ...