SQL 複製 INSERT mytable VALUES ('Dan'); 若使用最佳化鎖定,只有在執行個體中至少有一個使用 RangeI-N 隔離等級的交易時,才會取得 SERIALIZABLE 鎖定。 將 RangeI-N 模式的索引鍵範圍鎖定放在與名稱 David 對應的索引資料列來測試範圍。 如果授與鎖定,則會插入值為 Dan 的資料列,並在插入的資料列上放置獨佔...
SQL 复制 DELETE mytable WHERE name = 'Bob'; 在事务持续时间内,所有修改的行上都放置 TID 锁。 在与值 Bob 对应的索引行的 TID 上获取锁。 使用优化锁定,更新时将继续获取页锁和行锁,但每行更新后,每个页锁和行锁都会释放。 TID 锁可保护行在事务完成之前不被更新。 任何试图读取、插入或...
SQL コピー SELECT name FROM mytable WHERE name BETWEEN 'A' AND 'C'; 名前が Adam とDale の値の間にある行の範囲に対応する索引項目にキー範囲ロックが設定され、前のクエリで条件が満たされた新しい行が追加されたり、削除されたりするのを防ぎます。 この範囲の最初の...
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LSA_FREE_LSA_HEAP LSA_FREE_PRIVATE_HEAP LSA_FREE_LSA_HEAP LSA_FREE_SHARED_MEMORY LSA_GET_AUTH_DATA_FOR_USER LSA_GET_CALL_INFO GetCertificateFromCred LSA_GET_CLIENT_INFO LSA_GET_CREDENTIALS GetOpenCardName LSA_GET_USER_AUTH_DATA LSA_IMPERSONATE_CLIENT ImpersonateSecurityContext ImportSecurityContex...
Microsoft.Data.SqlClient 命名空間基本上是 System.Data.SqlClient 命名空間的新版本。 Microsoft.Data.SqlClient 的 API 和回溯相容性通常會維持與 System.Data.SqlClient 相同。 若要從 System.Data.SqlClient 移轉至 Microsoft.Data.SqlClient,對大部分的應用程式而言很簡單。 對 Microsoft.Data.SqlClient ...
Transact-SQL syntax conventions Syntax options Common syntax Simple CREATE TABLE syntax (common if not using options): syntaxsql Copy CREATE TABLE { database_name.schema_name.table_name | schema_name.table_name | table_name } ( { <column_definition> } [ ,... n ] ) [ ; ] Full syn...
This free offer has been replaced by the Azure SQL Database free offer, see Try Azure SQL Database for free. Starting in September 2023, you can try Azure SQL Database free of charge and get 100,000 vCore seconds of compute every month, for the life of your subscription. This free off...
This free offer has been replaced by the Azure SQL Database free offer, see Try Azure SQL Database for free. Starting in September 2023, you can try Azure SQL Database free of charge and get 100,000 vCore seconds of compute every month, for the life of your subscription. This free off...
ii. Create an update for your application and sign it with the previously specified certificate. iii. MSI will perform the elevation for the application when applying the patch. iv. The main advantage of this method over others is that it works with Standard User, and keeps the system secure...