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日期:2025-06-13
CASE 的語法如下: SELECT CASE ("欄位名") WHEN "條件1" THEN "結果1"
WHEN "條件2" THEN "結果2" ... [ELSE "結果N"] ENDFROM "表格名" "條件" 可以是
一個 ......
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日期:2025-06-15
In a simple CASE expression, Oracle Database searches for the first WHEN ...
THEN pair for which expr is equal to comparison_expr and returns return_expr ....
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日期:2025-06-09
The value of the CASE operand and WHEN operands in a simple CASE
statement can be any PL/SQL type other than BLOB , BFILE , an object type, a PL
/SQL ......
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日期:2025-06-15
case when x = y then a else b end case when x < y then a when x = y then b else
c end case XYZ when 'foo' then 'moo' else 'bar' end. The following little SQL ......
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日期:2025-06-13
2012年4月6日 ... SELECT grade, COUNT (CASE WHEN sex = 1 THEN 1 /*sex 1为男生,2位女生*/
ELSE NULL END) 男生数, COUNT (CASE WHEN sex = 2 ......
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日期:2025-06-13
CASE 语句CASE selector WHEN value1 THEN action1; WHEN value2 THEN ...
分类: ORACLE SQL优化 2009-08-12 14:10 46763人阅读 评论(1) 收藏 举报....
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日期:2025-06-12
I have the table with 1 column and has following data. Status a1 i t a2 ... You
could use an IN clause. Something like. SELECT status, CASE ......
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日期:2025-06-14
27 Apr 2004 ... DECODE is considered the most powerful function in Oracle. Oracle 8i release
introduced the CASE expression. The Oracle CASE statements ......