This table does not contain a primary key which causes the import to fail if the MySQL variable sql_require_primary_key is set to true. DigitalOcean recently changed their default variables and this is now required. I have worked around this by adding a composite primary key for id and ...
适用对象:SQL Server(从 SQL Server 2019 (15.x) 开始) 启用加速数据库恢复(ADR)。 默认情况下,ADR 在 SQL Server 2019 (15.x) 及更高版本中设置为 OFF。 使用此语法,可以为持久版本存储(PVS)数据指定特定的文件组。 如果未指定文件组,则 PVS 存储在 PRIMARY 文件组中。 有关详细信息,请参...
-RequireAuthentication指出是否要使用網路層級驗證來建立與用戶端電腦的遠端桌面連線。 展開資料表 類型: Boolean Position: Named 預設值: None 必要: False 接受管線輸入: False 接受萬用字元: False-ScanSchedule將掃描排程指定為排程物件。若要取得排程物件,請使用 New-CMSchedule Cmdlet。 展開資料表 類型: ...
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 ...
Transact-SQL syntax conventions Syntax syntaxsql SETIDENTITY_INSERT[ [database_name. ]schema_name. ]table_name{ON|OFF} Arguments database_name The name of the database in which the specified table resides. schema_name The name of the schema to which the table belongs. ...
Transact-SQL 語法慣例語法syntaxsql 複製 SET XACT_ABORT { ON | OFF } 備註當SET XACT_ABORT 是 ON 時,如果 Transact-SQL 陳述式產生執行階段錯誤,就會終止和回復整個交易。當SET XACT_ABORT 是 OFF 時,在某些情況下,只會回復產生錯誤的 Transact-SQL 陳述式,交易會繼續進行。 隨著錯誤嚴重性而不同,...
this setting just appies to fields in the value area of the pivot table. It has no effect on fields in the rows or columns area, which is the case in your example. The only way to suppress "(blank)" in row or colum fields is to create conditional f...
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It would also require a final data synchronization between the original and the new table before the final cut-off, if data continues to be changed by applications. See the following example for a "copy and replace" conversion of the MyString column to a new collation: SQL Copy CREATE ...
Returns a QuerySet that will “follow” foreign-key relationships, selecting additional related-object data when it executes its query. This is a performance booster which results in a single more complex query but means later use of foreign-key relationships won’t require database queries. The...