SQL Server / Oracle / MS Access: CREATETABLEPersons ( ID intNOTNULL, LastName varchar(255)NOTNULL, FirstName varchar(255), Age intCHECK(Age>=18) ); To allow naming of aCHECKconstraint, and for defining aCHECKconstraint on multiple columns, use the following SQL syntax: ...
Here, we have created a table namedOrderswith aCHECKconstraint that requires theamountvalue to be greater than0. When trying to insert a record with anamountvalue of100, the insertion process was successful because the value satisfies theCHECKconstraint condition. Example 2: SQL CHECK Constraint F...
SQL Server Azure SQL 数据库 Azure SQL 托管实例 检查当前数据库中指定表上的指定约束或所有约束的完整性。 Transact-SQL 语法约定 语法 syntaxsql DBCCCHECKCONSTRAINTS[ (table_name|table_id|constraint_name|constraint_id) ] [WITH[ {ALL_CONSTRAINTS|ALL_ERRORMSGS} ] [ , ] [NO...
将一行或多行添加到 SQL Server 的表或视图中。 有关示例,请参阅示例。 Transact-SQL 语法约定 语法 SQL Server 和 Azure SQL 数据库 和 Fabric SQL 数据库的语法 syntaxsql 复制 -- Syntax for SQL Server and Azure SQL Database and Fabric SQL database [ WITH <common_table_expression> [ ,......
SQL Server 和 Azure SQL 数据库 的语法。 syntaxsql 复制 CREATE [ OR ALTER ] VIEW [ schema_name . ] view_name [ (column [ ,...n ] ) ] [ WITH <view_attribute> [ ,...n ] ] AS select_statement [ WITH CHECK OPTION ] [ ; ] <view_attribute> ::= { [ ENCRYPTION ] [ SCHEMA...
-- Syntax for SQL Server and Azure SQL Database and Fabric SQL database [ WITH <common_table_expression> [ ,...n ] ] INSERT { [ TOP ( expression ) [ PERCENT ] ] [ INTO ] { | rowset_function_limited [ WITH ( <Table_Hint_Limited> [ ...n ] ) ] } { [ ( column_list...
Access database column validation is converted to a SQL Server DRI check constraint with a validation message as shown in the following table. Access database relationship SQL Server Foreign Key Validatio n Text Cascade Update ON DELETE NO ACTION ON ...
適用於:Microsoft Fabric 中的 SQL Server Azure SQL 資料庫 Azure SQL 受控執行個體 Azure Synapse Analytics AnalyticsPlatform System (PDW)SQL Database 藉由停用、重建或重新組織索引或設定索引選項,修改現有的資料表或檢視表索引 (資料列存放區、資料行存放區或 XML)。 Transact-SQL 語法慣例 Syntax SQL Server...
Dropping a constraint: alter tableStudent drop constraintDF_Student_Name Syntax: ALTERTABLE表名DROPCONSTRAINT 约束名 Cascading referential integrity constraint Cascading referential integrity constraint allows to define the actions Microsoft SQL Server should take when a user attempts to delete or update a...
违反完整性约束(INTEGRITY_CONSTRAINT_VIOLATION) 23001 违反限制(RESTRICT_VIOLATION) 23502 违反非空约束(NOT_NULL_VIOLATION) 23503 违反外键约束(FOREIGN_KEY_VIOLATION) 23505 违反唯一约束(UNIQUE_VIOLATION) 23514 违反CHECK约束(CHECK_VIOLATION) 23P01 违反排他约束(EXCLUSION_VIOLATION) 类24 - 非法游标状态 24000...