You cannot create a non-clustered index on a table variable, unless the index is a side effect of a PRIMARY KEY or UNIQUE constraint on the table (SQL Server enforces any UNIQUE or PRIMARY KEY constraints using an index). Also, SQL Server does not maintain statistics on a table variable,...
)CREATENONCLUSTEREDINDEXIX_#1_NrON#1(NrASC)GOSELECTB.NAMEASTABLENAME , A.object_id, a.name , a.index_id , a.typeFROMSYS.indexesASAINNERJOINSYS.TABLESASBONA.OBJECT_ID=B.OBJECT_IDWHEREB.NAMELIKE'#1[_]%'ORDERBYB.CREATE_DATEASC/*从返回的结果,我们看到在系统视图表SYS.INDEXS中,创建有两个...
AlterTableAlterColumnOption AlterTableAlterColumnStatement AlterTableAlterIndexStatement AlterTableAlterPartitionStatement AlterTableChangeTrackingModificationStatement AlterTableConstraintModificationStatement AlterTableDropTableElement AlterTableDropTableElementStatement AlterTableFileTableNamespaceStatement AlterTab...
Server. $tb.Create() #Create a unique, clustered, primary key index on the integer column. This is required for an XML index. #Define an Index object variable by providing the parent table and index name in the constructor. $cp = New-Object -TypeName Microsoft.SqlServer.Ma...
13,120 0 否 sql:variable 13121 0 否 sql:column 13122 0 否 XML 命名空间 13123 0 否 assembly 13124 0 否 全文目录 13125 16 否 执行身份 13126 16 否 对称密钥 (symmetric key) 13127 16 否 主体 13128 16 否 安全描述符 13129 16 否 假设索引 13130 16...
表变量在SQL Server 2000中首次被引入。表变量的具体定义包括列定义,列名,数据类型和约束。而在表变量中可以使用的约束包括主键约束,唯一约束,NULL约束和CHECK约束(外键约束不能在表变量中使用)。定义表变量的语句是正常使用Create Table定义表语句的子集。只是表变量通过DECLARE @local_variable语句进行定义。
()FROM@TVP; GO/* Declare a variable that references the type. */DECLARE@LocationTVPASLocationTableType;/* Add data to the table variable. */INSERTINTO@LocationTVP (LocationName, CostRate)SELECTName,0.00FROMAdventureWorks2022.Person.StateProvince;/* Pass the table variable data to a stored ...
Declaring, Populating, and Referencing a SQL Server Table Variable in a Batch The following screen shot illustrates a lifecycle for a table variable within a T-SQL script. The Messages tab below the script demonstrates how SQL Server interacts with the table variable during and after its lifecycle...
可变内容(variable) 事件时间(event_date) 数值/文本/时间表达式 选择项( selector ) 1.6 常用函数 近似分位数函数 quantile 与 近似中位数 median 方差函数 varSamp 条件函数 if 数组函数 arrayEnumerate(arr) match、multiMatchAny、multiMatchAnyIndex 1.7 常见用法举例 根据uuid查询用户在某一天的行为 查询在某...
DataModificationTableReference DataRetentionTableOption DataTypeReference DataTypeSequenceOption DbccCommand DbccNamedLiteral DbccOption DbccOptionKind DbccStatement DeallocateCursorStatement DeclareCursorStatement DeclareTableVariableBody DeclareTableVariableStatement DeclareVariableElement DeclareVariableStatement DefaultConstrai...