server SYSNAME NULL, source_database SYSNA创建表时,可以将某个查询的架构存储在该表中。SQL 复制 DECLARE @tsql NVARCHAR(MAX) = 'select top 0 * from sys.credentials'; INSERT INTO #frs EXEC sys.sp_describe_first_result_set @tsq
Applies to: SQL Server (Starting with SQL Server 2012 (11.x)) Runs the action in the current database. CURRENT isn't supported for all options in all contexts. If CURRENT fails, provide the database name. <accelerated_database_recovery> ::= Applies to: SQL Server (Starting with SQL Se...
Applies to: SQL Server (Starting with SQL Server 2012 (11.x)) Runs the action in the current database. CURRENT isn't supported for all options in all contexts. If CURRENT fails, provide the database name. <accelerated_database_recovery> ::= Applies to: SQL Server (Starting with SQL Se...
In this tip, we will show two ways to write a T-SQL SELECT query that returns rows that are sorted by a random number. Let’s begin by creating a table using the T-SQL CREATE TABLE statement below. USE MSSQLTips GO create table TestData ( pkID int identity(1,1) PRIMARY KEY, tes...
Step 2: Create a key vault Optional - Configure an Azure Key Vault Managed HSM (Hardware Security Module) Show 6 more Applies to: SQL Server In this article, you install and configure the SQL Server Connector for Azure Key Vault. Note Microsoft Entra ID was previously known as Azure Act...
对所修改的表的主键和唯一键的key各计算一个hash值(hash字符串由更新行的index,db,table,value按照一定规则拼接,这里不深究),放入到事务的写集合中(利用主键和unique key的唯一性来检测冲突和依赖)。 记录表的外键信息,如果表是某一些表的父表,调用Rpl_transaction_write_set_ctx::set_has_related_foreign_keys...
If you useDISTINCT,UNION,GROUP BY, orHAVING, or you include an aggregate expression in theselect_list, the cursor is created asSTATIC. If each underlying table doesn't have a unique index and an ISOSCROLLcursor or if a Transact-SQLKEYSETcursor is requested, the cursor is automatically aSTATI...
('F')CREATEUNIQUECLUSTEREDINDEXix_ScanCountONScanCount(Id)SETSTATISTICSIOON--Unique clustered Index used to search single valueSELECT*FROMScanCountWHEREId=1--Unique clustered Index used to search multiple valueSELECT*FROMScanCountWHEREIdIN(1,2,3,4,5,6)--Unique clustered Index used to search ...
Non_unique: 0 Key_name: PRIMARY - 索引名字 Seq_in_index: 1 - 索引中列顺序号从1开始 Column_name: ID - 索引列 Collation: A - 列怎样在索引中被排序 Cardinality: 6 - 索引中唯一值的数量 Sub_part: NULL Packed: NULL Null: Index_type: BTREE - 索引算法类型 ...
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_...