SqlConstraintType EnumReference Feedback DefinitionNamespace: Microsoft.SqlServer.Management.SqlParser.SqlCodeDom Assembly: Microsoft.SqlServer.Management.SqlParser.dll Package: Microsoft.SqlServer.SqlManagementObjects v150.18208.0 C# Copy public enum SqlConstraint...
我们需要设置sql_mode为“STRICT_TRANS_TABLES” set sql_mode='STRICT_TRANS_TABLES'; insert into a select 3,'bi'; 缺点:虽然enum这次是对非法的输入值进行了约束,但是只限于对离散数值的约束,对于传统check约束支持的连续值的范围约束或更复杂的约束,enum和set类型还是无能为力,这时用户需要通过触发器来实现...
DataTypeSequenceOption DbccCommand DbccNamedLiteral DbccOption DbccOptionKind DbccStatement DeallocateCursorStatement DeclareCursorStatement DeclareTableVariableBody DeclareTableVariableStatement DeclareVariableElement DeclareVariableStatement DefaultConstraintDefinition DefaultLiteral DelayedDurabilityDatabaseOption DelayedDurabil...
How do I fix this error: The ALTER TABLE statement conflicted with the FOREIGN KEY constraint ...? How do i insert a value to a DateTime datafield in SQL database? How do I iterate through ALL rows in a GridView? How do i load SQL Server XML datatype into XmlDocument in C# How...
DataTypeSequenceOption DbccCommand DbccNamedLiteral DbccOption DbccOptionKind DbccStatement DeallocateCursorStatement DeclareCursorStatement DeclareTableVariableBody DeclareTableVariableStatement DeclareVariableElement DeclareVariableStatement DefaultConstraintDefinition DefaultLiteral DelayedDurabilityDatabaseOption DelayedD...
Unless strict mode is disabled (not recommended, but see Section 5.1.10, “Server SQL Modes”), the definition of a ENUM or SET column acts as a constraint on values entered into the column. An error occurs for values that do not satisfy these conditions: An...
All referential cascade actions and constraint checks also must succeed before this trigger executes. InsteadOf 3 Specifies that the trigger is executed instead of the triggering SQL statement, thus overriding the actions of the triggering statements....
(REFERENTIAL_CONSTRAINTS Rowset)CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME adSchemaSchemata17Returns the schemas (database objects) that are owned by a given user. (SCHEMATA Rowset)CATALOG_NAME SCHEMA_NAME SCHEMA_OWNER adSchemaSQLLanguages18Returns the conformance levels, options, and dialects...
("25001"), message: "ALTER TYPE ... ADD cannot run inside a transaction block", detail: None, hint: None, position: None, where_: None, schema: None, table: None, column: None, datatype: None, constraint: None, file: Some("xact.c"), line: Some(3218), routine: Some("Prevent...
默认值(Default)的完整称呼是“默认值约束(Default Constraint)”,用来指定某字段的默认值。在表中插入一条新记录时,如果没有为某个字段赋值,系统就会自动为这个字段插入默认值。 在创建表时设置默认值约束 创建表时,在CREATE TABLE语句中使用 DEFAULT 关键字来设置默认值约束,具体的语法格式如下: DEFAULT ; ...