if exists(select * from sysobjects where name=表名 and xtype='U') drop table 表名; go --创建表 create table 表名 ( --字段声明 列名int identity(1,1) not null, 列名nvarchar(50) null, 列名nvarchar(50) null constraint 约束名 check(
`pid` int COMMENT 'parent id', `name` varchar(100) NOT NULL, PRIMARY KEY (`id`) ) ENGINE = InnoDB; CREATE TRIGGER pid_insert_check BEFORE INSERT ON department FOR EACH ROW BEGIN IF (NEW.pid <> 0 AND NEW.pid NOT IN (select id from department)) THEN signal sqlstate '45000' set ...
if exists(select * from sysobjects where name=表名 and xtype='U') drop table 表名; go --创建表 create table 表名 ( --字段声明 列名int identity(1,1) not null, 列名nvarchar(50) null, 列名nvarchar(50) null constraint 约束名 check(约束规则), 列名nvarchar(50) null, 列名int, 列名int ...
DBCC CHECKCONSTRAINTS (Transact-SQL) 2025/01/03 适用于: SQL Server Azure SQL 数据库 Azure SQL 托管实例 检查当前数据库中指定表上的指定约束或所有约束的完整性。 Transact-SQL 语法约定 语法 syntaxsql复制 DBCCCHECKCONSTRAINTS[ (table_name|table_id|constraint_name|constraint_id...
If an error occurs, it will return NULL value. In that case you could replace the NULL to 0...
SQL Server Check if multiple entries existNote:TheWHEREis optional, but may be more performant ...
The insert failed. It conflicted with an identity range check constraint in database %s, replicated table %s, column %s. If the identity column is automatically managed by replication, update the range as follows: for the Publisher, execute sp_adjustpublisheridentityrange; for the Subscriber, run...
If an error occurs, it will return NULL value. In that case you could replace the NULL to 0...
SQL Server SQL query to check if a key exists and its value is null in JSON columnYou may ...
SQL Server/Oracle/MS Access: CREATE TABLE Persons ( P_Id int NOT NULL CHECK(P_Id>0), LastName varchar(255) NOT NULL, FirstName varchar(255), Address varchar(255), City varchar(255) ) 如需命名CHECK约束,并定义多个列的CHECK 约束,使用下面的SQL语法: ...