比较和列表操作符
更新时间:
2019/08/09 GMT+08:00

比较操作符LT、LE、GT、GE、EQ和NE不得用作TABLE别名或COLUMN别名
以下章节介绍了支持的比较和列表操作符。
^=和GT
输入:比较操作(^=和GT)
SELECT t1.c1, t2.c2 FROM tab1 t1, tab2 t2 WHERE t1.c3 ^= t1.c3 AND t2.c4 GT 100;
输出
SELECT t1.c1, t2.c2 FROM tab1 t1, tab2 t2 WHERE t1.c3 <> t1.c3 AND t2.c4 > 100;
EQ和NE
输入:比较操作(EQ和NE)
SELECT t1.c1, t2.c2 FROM tab1 t1 INNER JOIN tab2 t2 ON t1.c2 EQ t2.c2 WHERE t1.c6 NE 1000;
输出
SELECT t1.c1, t2.c2 FROM tab1 t1 INNER JOIN tab2 t2 ON t1.c2 = t2.c2 WHERE t1.c6 <> 1000;
LE和GE
输
入:比较操作(LE和GE)
SELECT t1.c1, t2.c2 FROM tab1 t1, tab2 t2 WHERE t1.c3 LE 200 AND t2.c4 GE 100;
输出
SELECT t1.c1, t2.c2 FROM tab1 t1, tab2 t2 WHERE t1.c3 <= 200 AND t2.c4 >= 100;
NOT=和LT
输入:比较操作(NOT=和LT)
SELECT t1.c1, t2.c2 FROM tab1 t1, tab2 t2 WHERE t1.c3 NOT= t1.c3 AND t2.c4 LT 100;
输出
SELECT t1.c1, t2.c2 FROM tab1 t1, tab2 t2 WHERE t1.c3 <> t1.c3 AND t2.c4 < 100;
IN和NOT IN
详情请参见IN/NOT IN转换。
输入:IN和NOT IN
SELECT c1, c2 FROM tab1 WHERE c1 IN 'XY';
输出
SELECT c1, c2 FROM tab1 WHERE c1 = 'XY';

DWS支持IN和NOT IN操作符,但个别场景除外。
IS NOT IN
输入:IS NOT IN
SELECT c1, c2 FROM tab1 WHERE c1 IS NOT IN (subquery);
输出
SELECT c1, c2 FROM tab1 WHERE c1 NOT IN (subquery);
LIKE ALL/NOT LIKE ALL
输入:LIKE ALL/NOT LIKE ALL
SELECT c1, c2 FROM tab1 WHERE c3 NOT LIKE ALL ('%STR1%', '%STR2%', '%STR3%');
输出
SELECT c1, c2 FROM tab1 WHERE c3 NOT LIKE ALL (ARRAY[ '%STR1%', '%STR2%', '%STR3%' ]);
LIKE ANY/NOT LIKE ANY
输入:LIKE ANY/NOT LIKE ANY
SELECT c1, c2 FROM tab1 WHERE c3 LIKE ANY ('STR1%', 'STR2%', 'STR3%');
输出
SELECT c1, c2 FROM tab1 WHERE c3 LIKE ANY (ARRAY[ 'STR1%', 'STR2%', 'STR3%' ]);
父主题:
系统函数和操作符
相关文档
相关产品
