mysql - 子查询返回多于 1 行|是否可以使用 "AND NOT IN"？

Question

SELECT r.rom_ID
    FROM rom r
    WHERE r.rom_ID NOT LIKE(

    SELECT r.rom_ID
    FROM rom r, booking b 
    WHERE b.rom_ID = r.rom_ID 
    and (
         '2018-05-08' BETWEEN b.ankomstdato AND b.utsjekkdato OR
             '2018-05-12' BETWEEN b.ankomstdato AND b.utsjekkdato OR 
             ('2018-05-08' <= b.ankomstdato AND  '2018-05-12' >= b.utsjekkdato
        ) ) )  AND r.romtype_ID = 2
        LIMIT 1;

Answer 1

您可以使用 NOT IN 并避免使用隐式连接...使用显式连接例如:INNER JOIN

SELECT r.rom_ID
FROM rom r
WHERE r.rom_ID NOT IN (

SELECT r.rom_ID
FROM rom r
INNER JOIN  booking b  ON b.rom_ID = r.rom_ID 
and (
     '2018-05-08' BETWEEN b.ankomstdato AND b.utsjekkdato OR
         '2018-05-12' BETWEEN b.ankomstdato AND b.utsjekkdato OR 
         ('2018-05-08' <= b.ankomstdato AND  '2018-05-12' >= b.utsjekkdato
    ) ) )  AND r.romtype_ID = 2
    LIMIT 1;