uid 是列名，int 是输数据类型， primary key 是设置主键，identity 是设置种子和自增长标志，连起来看就好了
this is not something that is likely to be often useful in the real world but could come in handy if you want a function to return something random and "random-ish" is good enough (but be careful to remember the
USE Northwind; CREATE TABLE #CategoryChanges (ChangeID int Primary Key Identity , CategoryID int , OldCategoryName nvarchar(15) , NewCategoryName nvarchar(15) , ModifiedDate datetime2 , LoginID nvarchar(30)); BEGIN TRANSACTION UPDATE Categories SET CategoryName = 'Dried Produce' OUTPUT inserted.Cat...
IDENTITY 子句中的整数常数。 使用ODBC 扩展语法指定的常数。 可折叠常数表达式,它们是 +、-、*、/ 和% 运算符的参数。 考虑是否能够进行强制参数化时,当以下条件之一成立时,SQL Server 将认为表达式是可折叠常数表达式: 表达式中没有列、变量、或子查询。 表达式包含 CASE 子句。 查询提示子句的参数。 这些参数...
545 16 否 当IDENTITY_INSERT 设置为 ON 或某个复制用户向 NOT FOR REPLICATION 标识列中插入内容时,必须为表 '%.*ls' 中的标识列指定显式值。 547 16 否 %ls 语句与 %ls 约束 “%.*ls” 冲突。 数据库 “%.*ls” 中发生冲突,表“%.*ls”%ls%.*ls%ls。 548 16 否 插入失败。 ...
CopyCommandIdentityInsert CopyCredentialOption CopyOption CopyOptionKind CopyStatement CopyStatementOptionBase CreateAggregateStatement CreateApplicationRoleStatement CreateAssemblyStatement CreateAsymmetricKeyStatement CreateAvailabilityGroupStatement CreateBrokerPriorityStatement CreateCertificateStatement ...
[Sql server 2012] Change from vertical to horizontal table as dynamic @@FETCH_STATUS in nested loops @@ServerName returns wrong value in SQL SERVER 2008 ##TempTable and INSERT-SELECT FROM an existing Table with an IDENTITY column %rowtype equivalent in SQL server ++ operator in TSQL - bug ...
(idINTIDENTITY(1,1), [dbid]INT, [dbname] sysname, fgname sysname, isdoneBIT);INSERTINTO#tmpdbs ([dbid], [dbname], [isdone])SELECTdatabase_id,name,0FROMmaster.sys.databases (NOLOCK)WHEREis_read_only =0ANDstate =0;DECLARE@dbidINT, @queryVARCHAR(1000), @dbname sysname, @fgname ...
Azure Synapse Analytics doesn't supportPRIMARY KEYorUNIQUEconstraint orUNIQUEindex. For more information, seeUsing IDENTITY to create surrogate keys in a Synapse SQL pool. Consecutive values within a transaction- A transaction inserting multiple rows isn't guaranteed to get consecutive values for the ...
[DEFAULTconstant_expression] |IDENTITY[ ( seed , increment ) ] ] [ROWGUIDCOL] [column_constraint] [ ...n ]<column_constraint>::={ [NULL|NOTNULL] | [PRIMARYKEY|UNIQUE] |CHECK(logical_expression) }::={ {PRIMARYKEY|UNIQUE} (column_name[ , ...n ] ) |CHECK(logical_expression) } 参...