Conditionally alters the function only if it already exists. Optional OR ALTER syntax is available for CLR, starting with SQL Server 2016 (13.x) SP 1 CU 1. schema_name The name of the schema to which the user-defined function belongs. function_name The name of the user-defined function....
Conditionally alters the function only if it already exists. Optional OR ALTER syntax is available for CLR, starting with SQL Server 2016 (13.x) SP 1 CU 1. schema_name The name of the schema to which the user-defined function belongs. function_name The name of the user-defined function....
十三、sql server not exists exists : 强调的是是否返回结果集,不要求知道返回什么, 比如: select name from student where sex = 'm' and mark exists(select 1 from grade where ...) ,只要 exists引导的子句有结果集返回,那么exists这个条件就算成立了,大家注意返回的字段始终为1,如果改成“select 2 from...
Applies to: SQL Server 2016 (13.x) SP 1 and later versions, and Azure SQL Database. Conditionally alters the function only if it already exists. Optional OR ALTER syntax is available for CLR, starting with SQL Server 2016 (13.x) SP 1 CU 1. schema_name The name of the schema to wh...
(MySQL 8.0.29 and later:)CREATE PROCEDURE IF NOT EXISTS,CREATE FUNCTION IF NOT EXISTS, orCREATE TRIGGER IF NOT EXISTS, if successful, is written in its entirety to the binary log (including theIF NOT EXISTSclause), whether or not the statement raised a warning because the object (procedure...
ALTER PARTITION FUNCTION 用于执行以下操作的 ALTER TABLE: 添加、修改或删除列。 切换分区。 添加或删除 PRIMARY KEY 或 UNIQUE 约束。 备注 因为SQL Server 不支持针对系统表的用户定义的触发器,因此我们建议不要为系统表创建用户定义触发器。 优化DML 触发器 ...
CREATE[AGGREGATE]FUNCTION[IFNOTEXISTS]function_nameRETURNS{STRING|INTEGER|REAL|DECIMAL}SONAMEshared_library_name This statement loads the loadable function namedfunction_name. (CREATE FUNCTIONis also used to created stored functions; seeSection 15.1.17, “CREATE PROCEDURE and CREATE FUNCTION Statements”....
SQL Server Transact-SQL Index .NET Framework error occurred during execution of user-defined routine or aggregate "geography" 'IF EXISTS(SELECT COUNT(1))' VS 'IF EXISTS(SELECT 1) ' 'Incorrect syntax near' error while executing dynamic sql 'INSERT EXEC' within a function did not work 'Sort...
SQL Server 2022 (16.x) 中引入了有序聚集列存储索引。 有关详细信息,请参阅 CREATE COLUMNSTORE INDEX。 有关有序列存储索引可用性,请参阅 列存储索引:概述。 从SQL Server 2016 (13.x) 开始,可以将表创建为聚集列存储索引。 再也不需要先创建行存储表,然后将其转换为聚集列存储索引。 有关列存储索引设...
CREATE FULLTEXT CATALOG (Transact-SQL) CREATE FULLTEXT INDEX (Transact-SQL) CREATE FULLTEXT STOPLIST (Transact-SQL) CREATE FUNCTION (Transact-SQL) CREATE INDEX (Transact-SQL) CREATE LOGIN (Transact-SQL) CREATE MASTER KEY (Transact-SQL)