若要在现有表上创建索引,请使用 CREATE INDEX 命令。 CREATE INDEX 命令具有以下语法: CREATE [UNIQUE] INDEX index_name ON table (field1 [DESC][, field2 [DESC], ...]) [WITH {PRIMARY | DISALLOW NULL | IGNORE NULL}] 唯一必需的元素是 CREATE INDEX 命令、索引的名称、ON 参数、包含要编制索引的...
CREATE TABLE (Transact-SQL) 在现有表中创建 FOREIGN KEY 约束 ALTER TABLE (Transact-SQL) 如何在表之间创建关系 (Visual Database Tools) 删除FOREIGN KEY 约束 ALTER TABLE (Transact-SQL) 使用WITH NOCHECK 强制执行 FOREIGN KEY 约束 当向表中的现有列添加 FOREIGN KEY 约束时,默认情况下 数据库引擎 会检查...
CLR user-defined types are created with the CREATE TYPE statement before they can be used in a table definition. To create a column on CLR user-defined type, REFERENCES permission is required on the type. If type_schema_name is not specified, the SQL Server Database Engine references type_...
( BUCKET_COUNT = bucket_count ) } | FOREIGN KEY ( column_name [ ,... n ] ) REFERENCES referenced_table_name [ ( ref_column [ ,... n ] ) ] | CHECK ( logical_expression ) } <column_index> ::= INDEX index_name { [ NONCLUSTERED ] | [ NONCLUSTERED ] HASH WITH ( BUCKET_...
CREATE FULLTEXT INDEX (Transact-SQL) CREATE FULLTEXT STOPLIST (Transact-SQL) CREATE FUNCTION (Transact-SQL) CREATE INDEX (Transact-SQL) CREATE LOGIN (Transact-SQL) CREATE MASTER KEY (Transact-SQL) CREATE MESSAGE TYPE (Transact-SQL) CREATE PARTITION FUNCTION (Transact-SQL) ...
.SqlServer.Management.SMO.ForeignKeyColumn `-argumentlist$fk,"BusinessEntityID","BusinessEntityID"$fk.Columns.Add($fkc)#Set the referenced table and schema.$fk.ReferencedTable ="Employee"$fk.ReferencedTableSchema ="HumanResources"#Create the foreign key on the ...
.SqlServer.Management.SMO.ForeignKeyColumn `-argumentlist$fk,"BusinessEntityID","BusinessEntityID"$fk.Columns.Add($fkc)#Set the referenced table and schema.$fk.ReferencedTable ="Employee"$fk.ReferencedTableSchema ="HumanResources"#Create the foreign key on the instance of SQL Server.$fk.Create(...
基于SQL Server 系统数据类型的别名类型。 必须首先用 CREATE TYPE 语句创建别名数据类型,然后才能将它们用于表定义中。 在 CREATE TABLE 语句中,可以覆盖别名数据类型的 NULL 或 NOT NULL 赋值。 但是,长度规格不能更改;不能在 CREATE TABLE 语句中指定别名数据类型的长度。 CLR 用户定义类型。 必须首先用 CREATE...
SQL Көшіру CREATE TABLE friends ( id INTEGER PRIMARY KEY, start_date DATe ) AS EDGE; SQL Көшіру -- Create a likes edge table, this table does not have any user defined attributes CREATE TABLE likes AS EDGE; ...
mssql注入常要打交道的库也就是 master,其中储存了所有数据库名与存储过程。类比于 MySQL 中的information_schema元数据库 字段 C = CHECK 约束 D = 默认值或 DEFAULT 约束 F = FOREIGN KEY 约束 L = 日志 FN = 标量函数 IF = 内嵌表函数 P = 存储过程 ...