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-d
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...
(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...
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...
Applies to: Azure SQL Database, SQL Server (starting with SQL Server 2016 (13.x) SP1). Alters the procedure if it already exists. schema_name The name of the schema to which the procedure belongs. Procedures are schema-bound. If a schema name isn't specified when the procedure is crea...
This partition scheme must use the same partition function and partition columns as the partition scheme for the table; otherwise, an error is raised. If the table isn't partitioned, the FILESTREAM column can't be partitioned. FILESTREAM data for the table must be stored in a single ...
Applies to: Azure SQL Database, SQL Server (starting with SQL Server 2016 (13.x) SP1). Alters the procedure if it already exists. schema_name The name of the schema to which the procedure belongs. Procedures are schema-bound. If a schema name isn't specified when the procedure is crea...
创建定义为SQL查询的函数func_add_sql: DROP FUNCTION IF EXISTS func_add_sql; CREATE FUNCTION func_add_sql(integer, integer) RETURNS integer AS 'select $1 + $2;' LANGUAGE SQL IMMUTABLE RETURNS NULL ON NULL INPUT; 创建利用参数名自增一个整数的函数func_increment_plsql: DROP FUNCTION IF EXISTS...
SQL コピー CREATE TABLE dbo.SimpleTable( ProductKey [INT] NOT NULL, OrderDateKey [INT] NOT NULL, DueDateKey [INT] NOT NULL, ShipDateKey [INT] NOT NULL); GO CREATE CLUSTERED COLUMNSTORE INDEX cci_Simple ON dbo.SimpleTable; GO B. クラスター化インデックスを同じ名前のクラスター...
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”....