IDENTITY关键词指定该列为IDENTITY列。当用户向表中插入新的资料时,系统自动为该行的 IDENTITY列赋值,并保证其值在表中的唯一性。每个表中只能有一个IDENTITY列,其列值不能由用户更新,不允许空值,也不许关联默认值或建立 DEFAULT约束。IDENTITY列常与PRIMARY KEY约束一起使用,从而保证表中各行具有唯一标识。 ID
sql server 批量插入记录时,对有标识列的字段要设置 set IDENTITY_INSERT 表名 on,然后再执行插入记录操作;插入完毕后恢复为 off 设置 格式: set IDENTITY_INSERT 表名 on 插入数据的语句... set IDENTITY_INSERT 表名 off 举例: set IDENTITY_INSERT peoplePworkpositiontype on insert peoplePworkpositiontype(...
在任何时候,会话中的一个表只能将 IDENTITY_INSERT 属性设置为 ON。 如果表已将此属性设置为 ON,并且为另一个表发出 SET IDENTITY_INSERT ON 语句,SQL Server 将返回一条错误消息,指出 SET IDENTITY_INSERT 已ON,并报告为其设置了 ON 的表。 如果插入值大于表的当前标识值,则 SQL Server 自动将新...
SQL Copy INSERT INTO dbo.Tool (Name) VALUES ('Screwdriver'), ('Hammer'), ('Saw'), ('Shovel'); GO Create a gap in the identity values. SQL Copy DELETE dbo.Tool WHERE Name = 'Saw'; GO SELECT * FROM dbo.Tool; GO Try to insert an expli...
在Sql Server 数据库中对自增列的插入时,提示:当 IDENTITY_INSERT 设置为 OFF 时,不能为表 't_xxx' 中的标识列插入显式值。,解决方法如下:sqlserver批量插入记录时,对有标识列的字段要设置setIDENTITY_INSERT表名on,然后再执行插入记录操作;插入完毕后恢复为off设置格式
SET IDENTITY_INSERT [ [ database_name . ] schema_name . ] table_name { ON | OFF } Notă To view Transact-SQL syntax for SQL Server 2014 (12.x) and earlier versions, see Previous versions documentation.Argumentsdatabase_name Is the name of the database in which the specified table ...
SET IDENTITY_INSERT [ [ database_name . ] schema_name . ] table_name { ON | OFF } Uwaga To view Transact-SQL syntax for SQL Server 2014 (12.x) and earlier versions, see Previous versions documentation.Argumentsdatabase_name Is the name of the database in which the specified table res...
IDENTITY_INSERT property before executing the INSERT INTO statement and disable it after inserting the value, making sure that you mention the name of all NOT NULL columns and the identity column, and assign values for the for all these columns in the correct order, as in the T-SQL ...
CopyCommandIdentityInsert CopyCredentialOption CopyOption CopyOptionKind CopyStatement CopyStatementOptionBase CreateAggregateStatement CreateApplicationRoleStatement CreateAssemblyStatement CreateAsymmetricKeyStatement CreateAvailabilityGroupStatement CreateBrokerPriorityStatement CreateCertificateStatement Cre...
CopyCommandIdentityInsert CopyCredentialOption CopyOption CopyOptionKind CopyStatement CopyStatementOptionBase CreateAggregateStatement CreateApplicationRoleStatement CreateAssemblyStatement CreateAsymmetricKeyStatement CreateAvailabilityGroupStatement CreateBrokerPriorityStatement CreateCertificateStatement Crea...