Open the database table in the Design view, select Design option by right clicking the table name from the database as shown below. This opens up the table in design view. Now keep the mouse cursor on the column name whichneeds to be specified as primary key and click on Set Primary ...
ADR 預設會在 SQL Server 2019 (15.x) 和更新版本中設定為 OFF。 藉由使用此語法,您可以指定永續性版本存放區 (PVS) 資料的特定檔案群組。 如果未指定檔案群組,PVS 會使用 PRIMARY 檔案群組。 如需詳細資訊,請參閱 管理加速資料庫復原。 <auto_option> ::= 控制自動選項。 AUTO_CLOSE { ON | OFF } ...
下例创建一个含有标识列的表,并显示如何使用 SET IDENTITY_INSERT 设置填充由 DELETE 语句导致的标识值中的空隙。 -- Create products table. CREATE TABLE products (id int IDENTITY PRIMARY KEY, product varchar(40)) GO -- Inserting values into products table. INSERT INTO products (product) VALUES ('s...
SQL 複製 CREATE TABLE dbo.Tool ( ID INT IDENTITY NOT NULL PRIMARY KEY, Name VARCHAR (40) NOT NULL ); GO 將值插入 products 數據表。SQL 複製 INSERT INTO dbo.Tool (Name) VALUES ('Screwdriver'), ('Hammer'), ('Saw'), ('Shovel'); GO ...
SQL 复制 CREATE TABLE dbo.t ( a INT PRIMARY KEY, b1 INT ); GO CREATE VIEW dbo.v AS SELECT b1 AS b2 FROM dbo.t; GO EXEC sp_describe_first_result_set N'SELECT b2 AS b3 FROM dbo.v', NULL, 0; 以下为部分结果集。展开表 is_hiddencolumn_ordinalnamesource_sche...
CREATE TABLE products (id int IDENTITY PRIMARY KEY, product varchar(40)) 2.尝试在表中做以下操作: INSERT INTO products (id, product) VALUES(3, 'garden shovel') 结果会导致错误:“当 IDENTITY_INSERT 设置为 OFF 时,不能向表 'products' 中的标识列插入显式值。” ...
CREATE TABLE dbo.Tool( ID INT IDENTITY NOT NULL PRIMARY KEY, Name VARCHAR(40) NOT NULL ); GO -- Inserting values into products table. INSERT INTO dbo.Tool(Name) VALUES ('Screwdriver') , ('Hammer') , ('Saw') , ('Shovel'); GO -- Create a gap in the identity values. DELETE ...
SQL CREATETABLEdbo.Tool (IDINTIDENTITYNOTNULLPRIMARYKEY,NameVARCHAR(40)NOTNULL); GO Insert values into products table. SQL INSERTINTOdbo.Tool (Name)VALUES('Screwdriver'), ('Hammer'), ('Saw'), ('Shovel'); GO Create a gap in the identity values. ...
SQL CREATETABLEdbo.Tool (IDINTIDENTITYNOTNULLPRIMARYKEY,NameVARCHAR(40)NOTNULL); GO Insert values into products table. SQL INSERTINTOdbo.Tool (Name)VALUES('Screwdriver'), ('Hammer'), ('Saw'), ('Shovel'); GO Create a gap in the identity values. ...
SQL CREATETABLEdbo.Tool (IDINTIDENTITYNOTNULLPRIMARYKEY,NameVARCHAR(40)NOTNULL); GO 将值插入产品表中。 SQL INSERTINTOdbo.Tool (Name)VALUES('Screwdriver'), ('Hammer'), ('Saw'), ('Shovel'); GO 在标识值中创建空白。 SQL DELETEdbo.ToolWHEREName='Saw'; GOSELECT*FROMdbo.Tool; GO ...