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...
Syntax #1: IF-THEN IF condition THEN {...statements...} END IF; Syntax #2: IF-THEN-ELSE IF condition THEN {...statements...} ELSE {...statements...} END IF; Syntax #3: IF-THEN-ELSIF IF condition THEN {...statements...} ELSIF condition THEN {...statements...} ELSE {...st...
In these examples, we decide as per the conditions. For example, if I get a bonus then only I will go for an international vacation else I will go for domestic vacations. We need to incorporate these conditions-based decisions in programming logic as well. SQL Server provides the capability...
IF...THEN...ELSE...END IF The syntax of this statement is: IF boolean-expression THEN statements ELSE statements END IF; IF...THEN...ELSE statements specify an alternative set of statements that should be executed if the condition evaluates to FALSE. In the following example, the previous ...
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...
通过查看清单10,您可以知道为什么IIF函数被认为是CASE表达式的一个简化版本。CASE被“IIF(”字符串替换;“THEN”子句被替换为一个逗号;“ELSE”子句用逗号替换;“END”被替换为“)”。 当布尔表达式“OrderAmt > 200”值为TRUE时,显示的值为“High $ Order。当布尔表达式‘OrderAmt > 200”被求出来的值为FALSE...
syntaxsql IFboolean_expression{sql_statement|statement_block} [ELSE{sql_statement|statement_block} ] Arguments boolean_expression An expression that returnsTRUEorFALSE. If theboolean_expressioncontains aSELECTstatement, theSELECTstatement must be enclosed in parentheses. ...
Or you could have one clause that checks both the exam and student ids. Then place the original expression in theelseclause: Nesting cases like this can make sense if you've made a function for the percentages to letter conversions. For example: ...
-- Syntax for SQL Server and Azure SQL Database [ WITH <common_table_expression> [...n] ] UPDATE [ TOP ( expression ) [ PERCENT ] ] { { table_alias | | rowset_function_limited [ WITH ( <Table_Hint_Limited> [ ...n ] ) ] } | @table_variable } SET { column_name = {...
{ pos -= 1; sf->stats_folds += 1; if (left > 0) { left -= 1; } continue; } else if (syntax_merge_words(sf, &sf->tokenvec[left], &sf->tokenvec[left+1])) { pos -= 1; sf->stats_folds += 1; if (left > 0) { left -= 1; } continue; } else if ( ;f && (...