简单case语法是 就是实现. decode oracle 特有case when...分数>=60 THEN ‘及格’ ELSE ‘不及格’ END from 成绩表 case 表达式知 when 值1 then 结果道1 when 值2 then 结果2 else 结果3 也有另一种形式回...(qty,sort)values(1,’a’),(2,’b’),(3,’d’),(1,’e’) . 1.IIf函数 ...
1. CASE WHEN 表达式有两种形式 复制代码代码如下: 代码语言:js AI代码解释 --简单Case函数CASEsexWHEN'1'THEN'男'WHEN'2'THEN'女'ELSE'其他'END--Case搜索函数CASEWHENsex='1'THEN'男'WHENsex='2'THEN'女'ELSE'其他'END 2. CASE WHEN 在语句中不同位置的用法2.1 SELECT CASE WHEN 用法 复制代码代码如...
Oracle的CASE WHEN语法是一种在数据库查询中使用的条件语句,它提供了一种在SELECT语句中根据条件对结果进行转换或筛选的方法。在本文中,我们将详细介绍Oracle的CASE WHEN语法,并提供一些实际的示例。 CASE WHEN语句的基本语法结构如下: CASE WHEN condition1 THEN result1 ...
DECODE is considered the most powerful function in Oracle. Oracle 8i release introduced the CASE expression. The CASE expression can do all that DECODE does plus lot of other things including IF-THEN analysis, use of any comparison operator and checking multiple conditions, all in a SQL query i...
||CASE WHEN BITAND(time_model, POWER(2, 16)) = POWER(2, 16) THEN 'CURSOR_CLOSE ' END ||CASE WHEN BITAND(time_model, POWER(2, 17)) = POWER(2, 17) THEN 'SEQUENCE_LOAD ' END ||CASE WHEN BITAND(time_model, POWER(2, 18)) = POWER(2, 18) THEN 'INMEMORY_QUERY ' END ...
expdp GISDATA/GISDATA@localhost/orcl directory=dmp dumpfile=expdp.dmp Tables=test query='WHERE id<20' logfile=expdlog.log; 5、按表空间导 expdp GISDATA/GISDATA directory=dmp dumpfile=expdp.dmp TABLESPACES=GIDDATA,YWDATA logfile=expdlog.log; ...
'||CURRENT_VALUE;ENDIF;ELSECONDITIONS :=CONDITIONS||' = '||ALIAS||'.'||CURRENT_VALUE||' ';ENDIF;--循环值减1SIGNS :=SIGNS-1;ENDLOOP;--拼接关联SQLTARGET_RESULTS :=TARGET_RESULTS||'LEFT JOIN (SELECT DISTINCT '||QUERY_ITEMS||','||TEMP.QUERY_CONTENT||' AS A'||TEMP.ID||' FROM ...
WHEN en THEN rn [ ELSE r_else ]ENDCode language:SQL (Structured Query Language)(sql) In this syntax, Oracle compares the input expression (e) to each comparison expression e1, e2, …, en. If the input expression equals any comparison expression, theCASEexpression returns the corresponding re...
when no_data_found then raise_application_error(-20001,'该雇员不存在!'); end; / DECLARE v_empno emp.empno%type:=7788; v_ename emp.ename%type; v_sal emp.sal%type; BEGIN proc_query_emp(v_empno,v_ename,v_sal); dbms_output.put_line(v_ename||' '||v_sal); ...
Return the SQL for this fragment. This contains no validation - if the implementation is incomplete it will just return what it has. Error checking of fragments should be done using a SQLQueryBuilder. Returns: a string representing the SQL text for this object....