SQL 复制 EXEC sp_describe_first_result_set N'SELECT b2 AS b3 FROM v', NULL, 2; 结果集如下。展开表 is_hiddencolumn_ordinalnamesource_schemasource_tablesource_columnis_part_of_unique_key 0 1 B3 dbo v B2 0 1 2 ROWSTAT NULL NULL NULL 0...
sql_mode: NO_ENGINE_SUBSTITUTION SQL Original Statement: CREATE DEFINER=`me`@`localhost` TRIGGER ins_sum BEFORE INSERT ON account FOR EACH ROW SET @sum = @sum + NEW.amount character_set_client: utf8 collation_connection: utf8_general_ci Database Collation: latin1_swedish_ci 1. 2. 3. 4...
CREATETABLEScanCount(IdINTIDENTITY(1,1),ValueCHAR(1))INSERTINTOScanCount(Value)VALUES('A'),('B'),('C'),('D'),('E'),('F')CREATEUNIQUECLUSTEREDINDEXix_ScanCountONScanCount(Id)SETSTATISTICSIOON--Unique clustered Index used to search single valueSELECT*FROMScanCountWHEREId=1--Unique clus...
is_part_of_unique_key bit 如果數據行是唯一索引的一部分,則傳回 1(包括唯一和主要條件約束),如果不是,則傳回 0。 如果無法判斷數據行是唯一索引的一部分,則傳回NULL。 只有在要求瀏覽資訊時才會填入。 is_updateable bit 如果數據行是可更新的,則傳回 1;如果不是,則傳...
实体完整性:保证表中有一个主键。在InnoDB存储引擎表中,用户可以通过定义primary key或unique key约束来保证实体的完整性。用户还可以通过编写一个触发器来保证数据完整性 域完整性:保证数据每列的值满足特定的条件。在InnoDB存储引擎表中,域完整性可以通过以下途径来保证: ...
DECLARE@fileListTableTABLE([LogicalName]NVARCHAR(128),[PhysicalName]NVARCHAR(260),[Type]CHAR(1),[FileGroupName]NVARCHAR(128),[Size]NUMERIC(20,0),[MaxSize]NUMERIC(20,0),[FileID]BIGINT,[CreateLSN]NUMERIC(25,0),[DropLSN]NUMERIC(25,0),[UniqueID]UNIQUEIDENTIFIER,[ReadOnlyLSN]NUMERIC(25,0),...
The names of server-level firewall settings must be unique. If the name of the setting provided for the stored procedure already exists in the firewall settings table, the starting and ending IP addresses are updated. Otherwise, a new server-level firewall setting is created....
Other SQL Server logins that might enable TDE or other SQL Server encryption features. There's one-to-one mapping between credentials and logins. That is, each login must have a unique credential. Modify this Transact-SQL script in the following ways: Edit the IDENTITY argument (DocsSampleEKM...
SQL Másolás SELECT i.name AS index_name , i.type_desc , i.is_unique , ds.type_desc AS filegroup_or_partition_scheme , ds.name AS filegroup_or_partition_scheme_name , i.ignore_dup_key , i.is_primary_key , i.is_unique_constraint , i.fill_factor , i.is_padded , i.is_...
[US] } ) SELECT NON EMPTY HIERARCHIZE (AddCalculatedMembers ({DrillDownLevel ({[Product].[All Products]}) }) ) DIMENSION PROPERTIES PARENT_UNIQUE_NAME ON COLUMNS FROM [Adventure Works] WHERE ([Geography].[State-Province].x, [Date].[Calendar].[Calendar Quarter].&[2003]&[4] ,[Measures]...