使用ITableDefinition::CreateTable函数创建表时,SQL Server Native Client OLE DB 访问接口使用者可以在传递的 DBCOLUMNDESC 数组的 pwszTypeName成员中指定 SQL Server 数据类型。 如果使用者按照名称指定列的数据类型,则忽略由 DBCOLUMNDESC 结构的 wType 成员表示的 OLE DB 数据类型映射 。
Starting with SQL Server 2014 (12.x), new syntax was introduced which allows you to create certain index types inline with the table definition. Using this new syntax, you can create indexes on table variables as part of the table definition. In some cases, performance may improve by using...
syntaxsql 複製 CREATE TABLE { database_name.schema_name.table_name | schema_name.table_name | table_name } ( { <column_definition> | [ <table_constraint> ] [ ,... n ] | [ <table_index> ] [ ,... n ] } [ PERIOD FOR SYSTEM_TIME ( system_start...
程序集: Microsoft.SqlServer.TransactSql.ScriptDom(在 Microsoft.SqlServer.TransactSql.ScriptDom.dll 中) 语法 C# 复制 [SerializableAttribute] public class TableDefinition : TSqlFragment TableDefinition 类型公开以下成员。 构造函数 展开表 名称说明 TableDefinition Initializes a new instance of the Table...
SQL ALTERTABLEdbo.ProductsDROPCOLUMNRetailValue; GOALTERTABLEdbo.ProductsADDRetailValueAS(QtyAvailable * UnitPrice *1.5); GO Related content ALTER TABLE (Transact-SQL) ALTER TABLE computed_column_definition (Transact-SQL) Athugasemdir Var þessi síða gagnleg?
ALTER TABLE ändert eine Tabellendefinition durch Ändern, Hinzufügen oder Löschen von Spalten und Einschränkungen. Mit ALTER TABLE können Sie zudem Partitionen neu zuweisen und erstellen oder Einschränkungen und Trigger deaktivieren und
Consider an Orders table with the following definition: SQL Copy CREATE TABLE dbo.Orders ( OrderID INT NOT NULL PRIMARY KEY NONCLUSTERED, CustomerID INT NOT NULL INDEX IX_CustomerID HASH WITH (BUCKET_COUNT = 10000), OrderDate DATETIME NOT NULL, OrderDescription NVARCHAR(1000) ) WITH (MEMORY...
The order of column names specified in the hint must match the order of the columns in the referenced index. Columns that aren't in the index key definition can't be specified. For example, in a nonclustered index, only the defined index key columns can be specified. Clustered key columns...
[definition] from sys.check_constraints con left outer join sys.objects t on con.parent_object_id = t.object_id left outer join sys.all_columns col on con.parent_column_id = col.column_id and con.parent_object_id = col.object_id union all select schema_name(t.schema_id) + '.' ...
--https://msdn.microsoft.com/zh-cn/library/ms179853(v=sql.120).aspx --为表添加描述信息 EXECUTEsp_addextendedproperty N'MS_Description','导入员工资料表', N'SCHEMA', N'dbo', N'table', N'StaffList',NULL,NULL EXECsp_updateextendedproperty N'MS_Description','导入员工资料表', N'SCHEMA',...