> CREATE FUNCTION area(x DOUBLE, y DOUBLE) RETURNS DOUBLE RETURN x * y; -- Use a SQL function in the SELECT clause of a query. > SELECT area(c1, c2) AS area FROM t; 0.0 2.0 -- Use a SQL function in the WHERE clause of a query. > SELECT * FROM t WHERE area...
Syntax for CLR function clauses. syntaxsql 复制 <order_clause> ::= { <column_name_in_clr_table_type_definition> [ ASC | DESC ] } [ , ...n ] <method_specifier> ::= assembly_name.class_name.method_name <clr_function_option> ::= { [ RETURNS NULL ON NULL INPUT | CALLED ON NU...
INSERT INTO #TESTTABLE (VALID_FROM, VALID_TILL) VALUES (GETDATE(), NULL) SELECT * FROM #TESTTABLE WHERE ISNULL(VALID_TILL, GETDATE()) = CAST(GETDATE() AS DATE) SELECT * FROM #TESTTABLE WHERE VALID_TILL = CAST(GETDATE() AS DATE) SELECT * FROM #TESTTABLE WHERE IIF(VALID_TILL IS...
syntaxsql 複製 <order_clause> ::= { <column_name_in_clr_table_type_definition> [ ASC | DESC ] } [ , ...n ] <method_specifier> ::= assembly_name.class_name.method_name <clr_function_option> ::= { [ RETURNS NULL ON NULL INPUT | CALLED ON NULL INPUT ] | [...
SQLRETURN SQLGetInfo( SQLHDBC ConnectionHandle, SQLUSMALLINT InfoType, SQLPOINTER InfoValuePtr, SQLSMALLINT BufferLength, SQLSMALLINT * StringLengthPtr); Arguments ConnectionHandle [Input] Connection handle. InfoType [Input] Type of information. InfoValuePtr [Output] Pointer to a buffer in which...
In general, these are either M or EURX. Contact your system administrator for the details of your specific table configuration. LOOKUP: The type of lookup to be performed. Possible values: Regular: A regular conversion is performed. Reverse: Performs a reverse conversion with the input units swa...
[Output] Pointer to an integer buffer in which to return the value in theFieldIdentifierfield of theColumnNumberrow of the IRD, if the field is a numeric descriptor type, such as SQL_DESC_COLUMN_LENGTH. Otherwise, the field is unused. Please note that some drivers may only write the lowe...
SQL COUNT() Function Examples Run and edit the code from this tutorial onlineRun code Counting the number of rows with COUNT(*) The table called products contains all the products a company sells. The COUNT(*) clause allows us to calculate the number of rows in the table. SELECT COUNT(...
今天使用Postgres数据库在编写sql 时,执行后发现报错:column "XXXXXX" must appear in the GROUP BY clause or be used in an aggregate function 根据提示把查询的字段放到分组后,查询的结果又不是自己需要的,在网上查询了一下解决方法,特此记录 问题产生的原因:这是pgsql一个常见的聚合问题,在SQL3标准以前,选...
Learn how the XQuery function sql:column() can be used to bind non-XML relational data inside XML and bring relational and XML data together.