有关此成员的完整信息,包括语法、用法和示例,请单击重载列表中的名称。 重载列表 展开表 名称说明 AddDefaultConstraint() () () () 将默认约束添加到该列中。 AddDefaultConstraint(String) 将默认约束添加到该列中。 页首 请参阅 参考 Column 类 Microsoft.SqlServer.Management.Smo 命名空间 ...
Add Time in SQL HH:MM:SS to another HH:MM:SS Adding a column to a large (100 million rows) table with default constraint adding a extra column in a pivot table created uisng T-SQL Pivot Table query Adding a partition scheme to an existing table. Adding a Value to a 'date' Column...
col.AddDefaultConstraint(null);// Use SQL Server default namingcol.DefaultConstraint.Text = Properties.Resources.DefaultConstraintText; col.Nullable =false;// Add the third columncol =newColumn(tbl,@"Column3", DataType.DateTime); tbl.Columns.Add(col); col.Nullable =false;// Create the tablet...
CONSTRAINT D_TableA_Column1 --when the Constraint is deleted a default constraint name will be generated automatically DEFAULT (0) --Default constraint, not mandatory to use. WITH values --If you want to add a default value for existing records and column is nullable then add this...
AddDefaultConstraint(String) C# コピー public Microsoft.SqlServer.Management.Smo.DefaultConstraint AddDefaultConstraint (string name); Parameters name String Returns DefaultConstraint Applies to Microsoft.SqlServer.SqlManagementObjects 160.2004021.0 および Microsoft.SqlServer.SqlManagementObjects 150.18208....
publicSystem.Data.ConstraintAdd(string? name, System.Data.DataColumn primaryKeyColumn, System.Data.DataColumn foreignKeyColumn); 參數 name String ForeignKeyConstraint的名稱。 primaryKeyColumn DataColumn 主索引鍵,或父DataColumn。 foreignKeyColumn DataColumn ...
ADD column_name datatype [DEFAULT default_value] [NULL|NOT NULL] [CONSTRAINT constraint_name] [column_constraint_clause]; Swap table_name with the table’s name to which you wish to add the column(s). The column_name specifies the name of the column you wish to add to the table. This...
Use the ADD CONSTRAINT clause to specify a primary key, foreign key, referential, unique, or check constraint on a new or existing column or on a set of columns. This syntax fragment is part of theALTER TABLE statement. For NULL and NOT NULL constraints, use instead the ...
name, System.Data.DataColumn parentColumn, System.Data.DataColumn childColumn); 参数 name String 关系的名称。 parentColumn DataColumn 该关系的父列。 childColumn DataColumn 该关系的子列。 返回 DataRelation 创建的关系。 注解 DataRelation将 对象添加到集合时, ForeignKeyConstraintUniqueConstraint默认情况...
Adding default constraint or unique constraint with SQL Adding a column with a default constraint Update with a Value How is this achieved? Overview of SQL ADD COLUMN clause Add column SQL with a default value to an existing table in SQL Server ...