我們不會再定期更新此內容。 如需此產品、服務、技術或 API 的支援資訊,請參閱Microsoft 產品生命週期。 建議的版本 搜尋 Learn 舊版本 SQL SQL Server 2012 ConstraintDefinition 類別 閱讀英文 共用方式為 Facebookx.comLinkedIn電子郵件 ConstraintDefinition 方法 2013/02/01 本文內容 方法 請參閱
ConstraintDefinition.ConstraintIdentifier Property Reference Definition Namespace: Microsoft.SqlServer.TransactSql.ScriptDom Assembly: Microsoft.SqlServer.TransactSql.ScriptDom.dll Package: Microsoft.SqlServer.DacFx.x64 v140.3881.1 The name of the constraint. C# 复制 publi...
ConstraintDefinition.ConstraintIdentifier 屬性 文章 26/04/2013 在此文章 語法 請參閱 Gets the name of the constraint.命名空間: Microsoft.SqlServer.TransactSql.ScriptDom 組件: Microsoft.SqlServer.TransactSql.ScriptDom (在 Microsoft.SqlServer.TransactSql.ScriptDom.dll 中)...
This class translates 80 syntax into 90 syntax, this should be reflected in the AST, if a differentiator is to be written. C# コピー [System.Serializable] public class UniqueConstraintDefinition : Microsoft.SqlServer.TransactSql.ScriptDom.ConstraintDefinition Inheritance Object TSqlFragment Constraint...
Azure SQL Managed Instance SQL database in Microsoft Fabric Specifies the properties of a PRIMARY KEY, FOREIGN KEY, UNIQUE, or CHECK constraint that is part of a new column definition added to a table by usingALTER TABLE. Transact-SQL syntax conventions ...
Specifies the properties of a PRIMARY KEY, UNIQUE, FOREIGN KEY, or CHECK constraint, or a DEFAULT definition added to a table by using ALTER TABLE. Transact-SQL Syntax Conventions Syntax Copy [ CONSTRAINT constraint_name ] { { PRIMARY KEY | UNIQUE } [ CLUSTERED | NONCLUSTERED ] (column ...
Definition To limit or restrict The state of being limited or restricted 27 Example "These rules constrain us from playing." "There are several constraints to consider." 21 Usage Implies an action that's happening or may occur Signifies a condition already in place 13 Origin Derived from Latin...
TheFOREIGN KEYconstraint prevents invalid data from being inserted into the foreign key column, because it has to be one of the values contained in the parent table. SQL FOREIGN KEY on CREATE TABLE The following SQL creates aFOREIGN KEYon the "PersonID" column when the "Orders" table is cr...
SQLWarning Statement Time Timestamp Types Java.Text Java.Time Java.Time.Chrono Java.Time.Format Java.Time.Temporal Java.Time.Zone Java.Util Java.Util.Concurrent Java.Util.Concurrent.Atomic Java.Util.Concurrent.Locks Java.Util.Functions Java.Util.Jar ...
In the older versions of MySQL, only a limited syntax to create CHECK constraints is supported, and the constraint is neither created nor evaluated: the constraint definition is ignored.MySQL 8.0.15 Behavior. MySQL mysql> CREATE TABLE t1 (c1 INTEGER CHECK (c1 > 0)); Query OK, 0 rows ...