句法(Syntax) In the following SQL IF Statement, it evaluates the expression, and if the condition is true, then it executes the statement mentioned in IF block otherwise statements within ELSE clause is executed. 在下面SQL IF语句中,它计算表达式,如果条件为true,则执行IF块中提到的语句,否则将执行...
今天,写存储过程时写成了:if...then...else if...else...end if.能编译通过,但是有问题,后来实在是找不到问题怀疑写错了这个语句,后来在网上查了一下,结果不是else if 而是elsif.改过来后就正常了。 Oracle/PLSQL: IF-THEN-ELSE Statement There are three different syntaxes for these types of statemen...
Spark SQL 官方文档中SQL Syntax一节对Grouping Sets语句的描述如下: Groups the rows for each grouping set specified after GROUPING SETS. (... 一些举例) This clause is a shorthand for aUNION ALLwhere each leg of theUNION ALLoperator performs aggregation of each grouping set specified in theGROUPIN...
IF...THEN...END IF The syntax of this statement is: IF boolean-expression THEN statements END IF; IF...THEN statements are the simplest form of IF. The statements between THEN and END IF are executed only if the condition evaluates to TRUE. In the following example, an IF...THEN stat...
可以看到,既然分组的逻辑是一种if else形式的,我们可不可以在mysql里找到这种逻辑的关键字呢?显然是有的,那便是 case语句。以下是其官方文档: Syntax: CASE value WHEN [compare_value] THEN result [WHEN [compare_value] THEN result ...] [ELSE result] END 或者 CASE WHEN [condition] THEN result [WHE...
If you omit TABLESPACE, then Oracle creates that item in the default tablespace of the owner of the schema containing the table.For heap-organized tables with one or more LOB columns, if you omit the TABLESPACE clause for LOB storage, then Oracle creates the LOB data and index segments in ...
If you need to use this logic in many tables you could place it in a PL/SQL function. Then call this function in your SQL: FromOracle Database 23ai, theautomatic SQL transpilercan extract SQL expressions in PL/SQL. These are then part of the SQL statement, so at runtime it's as...
Note: You can't use WITH RECOMPILE when calling a stored procedure that uses OPENDATASOURCE syntax. The WITH RECOMPILE option is ignored when a four-part object name is specified.Note: RECOMPILE isn't supported with natively compiled, scalar user-defined functions. If you need to recompile,...
(200))'); prepare stmt1 from @sql1; execute stmt1; deallocate prepare stmt1; -- 循环解析key值、value值 if length(`keys`) < 1 OR length(ifnull(`keys`,'')) = 0 then call p_bd_sql_log('存储过程执行过程中发生异常','p_dl_save_collection_batch','参数无效'); else while idx !
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....