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---2019.7.17 15:44 add
--字符內容含A或C
select * from (
select 1 id, 'ABC' s1 from dual union all
select 2 id,'AC' s1 from dual union all
select 3 id,'BC' s1 from dual union all
select 4 id,null s1 from dual union all
select 5 id,'' s1 from dual union all
select 6 id,'B' s1 from dual union all
select 7 id,'D' s1 from dual
) where regexp_like(nvl(s1,' '),'A|C')
;
ID S1
1 ABC
2 AC
3 BC
--字符內容不包含A 且 不包含B
select * from (
select 1 id, 'ABC' s1 from dual union all
select 2 id,'AC' s1 from dual union all
select 3 id,'BC' s1 from dual union all
select 4 id,null s1 from dual union all
select 5 id,'' s1 from dual union all
select 6 id,'B' s1 from dual union all
select 7 id,'D' s1 from dual
) where not regexp_like(nvl(s1,' '),'A|C')
;
ID S1
4
5
6 B
7 D
--字符內容含01或05 ,字符串兩邊加逗號再比較，防止匹配到011這種記錄。
select * from (
select 1 id, '01,02,03' s1 from dual union all
select 2 id,'01,03' s1 from dual union all
select 3 id,'02,03' s1 from dual union all
select 4 id,null s1 from dual union all
select 5 id,'' s1 from dual union all
select 6 id,'011' s1 from dual union all
select 7 id,'05' s1 from dual union all
select 8 id,'012' s1 from dual union all
select 9 id,'06,013' s1 from dual
) where regexp_like(','||nvl(s1,' ')||',',',01,|,05,')
;
ID S1
1 01,02,03
2 01,03
7 05
--字符內容不包含01也包含05，空也要查出來
select * from (
select 1 id, '01,02,03' s1 from dual union all
select 2 id,'01,03' s1 from dual union all
select 3 id,'02,03' s1 from dual union all
select 4 id,null s1 from dual union all
select 5 id,'' s1 from dual union all
select 6 id,'011' s1 from dual union all
select 7 id,'05' s1 from dual union all
select 8 id,'012' s1 from dual union all
select 9 id,'06,013' s1 from dual
) where not regexp_like(','||nvl(s1,' ')||',',',01,|,05,')
;
ID S1
3 02,03
4
5
6 011
8 012
9 06,013
另外以下2個sql等價
sql1:
SELECT SUBSTR(UPPER(cardno),1,18) idcard18,lx.name as cartype_d,t.*
FROM TA t
LEFT JOIN TB LX ON cartype = LX.CODE AND
LX.dic_type='CARTYPE'
WHERE FILE_TIME = 20190716 --時間
AND NOT regexp_like(nvl(zt,' ') ,'B|C|D|E|H|J|K|L|M|O|P') --剔除車輛狀態不符合要求的
AND cartype IN (select CODE from TB where dic_type='CARTYPE' AND NVL(FIELD1,'0') <> 1) --剔除摩托車等包括225種類型
order by idcard18
sql2:
SELECT SUBSTR(UPPER(cardno),1,18) idcard18,lx.name as cartype_d,d1.*,d2.*,t.*
FROM TA t
LEFT JOIN TB LX ON cartype = LX.CODE AND
LX.dic_type='CARTYPE'
LEFT JOIN (select listagg(CODE,'|') within group (order by code) dtype from TB where dic_type='CARTYPE' AND NVL(FIELD1,'0') = 1 ) d1
ON 1 = 1
LEFT JOIN (select listagg(CODE,'|') within group (order by code) dzt from TB where dic_type='ZT' AND NVL(FIELD1,'0') = 1 ) d2
ON 1 = 1
WHERE FILE_TIME = 20190716 --時間
AND NOT regexp_like(nvl(cartype,' ') ,d1.dtype)--剔除車輛狀態不符合要求的
AND NOT regexp_like(nvl(zt,' ') ,d2.dzt)--剔除摩托車等包括225種類型
order by idcard18
其中
NOT regexp_like(nvl(zt,' ') ,'B|C|D|E|H|J|K|L|M|O|P')
等價於
(zt NOT LIKE '%B%' AND zt NOT LIKE '%C%' AND zt NOT LIKE '%D%' AND zt NOT LIKE '%E%'
AND zt NOT LIKE '%H%' AND zt NOT LIKE '%J%' AND zt NOT LIKE '%K%'
AND zt NOT LIKE '%L%' AND zt NOT LIKE '%M%' AND zt NOT LIKE '%O%' AND zt NOT LIKE '%P%' )
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--字符串從頭到尾都是數字，即整個字符串是數字 regexp_like(字符串,'^[0-9]+$') 返回boolean,常用於where條件
select * from (
select 'a123' s1 from dual
union all select '123' s1 from dual
union all select null str from dual
union all select '1' s1 from dual
) where regexp_like(s1,'^[0-9]+$')
;
123
1
--返回日期格式如2018-05-16
select * from (
select '0123-45-15-8' s1 from dual
union all select '0981-789abcd' s1 from dual
union all select '2018-05-16' s1 from dual
union all select null str from dual
union all select 'abc012-1598' s1 from dual
) where regexp_like(s1,'^\d{4}-\d{2}-\d{2}$')
;
2018-05-16
-----只取數字部分，字符替換掉
select id,regexp_replace(a1,'[^0-9]') from (
select 1 id,'1' a1 from dual union all
select 2 id,'a1b89' a1 from dual union all
select 3 id,' ' a1 from dual union all
select 4 id,null a1 from dual union all
select 5 id,'198c70205' a1 from dual
) ;
1 1
2 189
3
4
5 19870205
-----找出含有 xf 或 AB 的
select * from (
select 1 id, 'zfood' a1 from dual union all
select 2 id, 'xfood' a1 from dual union all
select 3 id, 'Z021' a1 from dual union all
select 4 id, 'cfood' a1 from dual union all
select 5 id, 'AB78' a1 from dual union all
select 6 id, 'x' a1 from dual
) where regexp_like(a1,'xf|AB')
2 xfood
4 AB78
-----找出含有 x 或 f 或 A 或 B 的
select * from (
select 1 id, 'zfood' a1 from dual union all
select 2 id, 'xfood' a1 from dual union all
select 3 id, 'Z021' a1 from dual union all
select 4 id, 'cfood' a1 from dual union all
select 5 id, 'AB78' a1 from dual union all
select 6 id, 'x' a1 from dual
) where regexp_like(a1,'[xf|AB]')
1 zfood
2 xfood
4 cfood
5 AB78
6 x
----逗號出現了幾次
select s1,regexp_count(s1,',') a1 from (
select '01,06,07,09' s1 from dual union all
select '02' from dual union all
select null from dual union all
select ' ' from dual union all
select '06,07' from dual
);
01,06,07,09 3
02 0
0
06,07 1
--字符串中含有 0數字數字-數字數字數字 的子串
select * from (
select '0123-456' s1 from dual
union all select '098-789abcd' s1 from dual
union all select null str from dual
union all select 'abc012-1598' s1 from dual
) where regexp_like(s1,'0\d\d-\d\d\d')--等價於 regexp_like(s1,'0\d{2}-\d{3}') 只要求0加2個數字-3個數字，開頭和最后
接數字或字符都不管
;
098-789abcd
abc012-1598
--字符串必現0開頭再連續5個數字結尾
select * from (
select '0123-456' s1 from dual
union all select '098789' s1 from dual
union all select null str from dual
union all select 'abc0121598' s1 from dual
) where regexp_like(s1,'^0\d\d\d\d\d$')--等價於 regexp_like(s1,'^0\d{5}$')
;
098789
--0開頭2個字符結尾 \w匹配字符或數字或下划線或漢字,但不匹配其他符號
select * from (
select '0我p' s1 from dual
union all select '01,' s1 from dual
union all select '012' s1 from dual
union all select '0a_' s1 from dual
union all select '0abb' s1 from dual
) where regexp_like(s1,'^0\w\w$')
;
0我p
012
0a_
--4個字符.txt結尾 \用於轉義
select * from (
select 'word.txt' s1 from dual
union all select 'wordtxt' s1 from dual
union all select 'helloword.txt' s1 from dual
union all select '01ab.txt' s1 from dual
) where regexp_like(s1,'^\w{4}\.txt$')
;
word.txt
01ab.txt
--IP地址 xxx.xxx.xxx.xxx
select * from (
select '(012)-12345678' s1 from dual
union all select '1.12.2.1' s1 from dual
union all select '3.998.1.1' s1 from dual
) where regexp_like(s1,'^(\d{1,3}\.){3}\d{1,3}$')
;
1.12.2.1
3.998.1.1
小結:
^放在[]外表示開頭,放在[]里面表示非;
$表示結尾;
+表示一個或多個;
\d和[0-9]都表示數字;
{4}表示4個;
[]表示里面的字符一個一個匹配;
|表示或者，沒有[]的|表示多個字符一起匹配;