看代碼吧~
WITH Name AS (
SELECT
*
FROM
(
SELECT
xzqdm,
SUBSTRING (zldwdm, 1, 9) xzdm,
COUNT (*) sl
FROM
sddltb_qc
WHERE
xzqdm IN ('130432', '210604')
GROUP BY
xzqdm,
SUBSTRING (zldwdm, 1, 9)
) AS A
ORDER BY
xzqdm,
xzdm,
sl
) SELECT
xzqdm,
xzdm,
sl
FROM
(
SELECT
*, ROW_NUMBER () OVER (
PARTITION BY xzqdm
ORDER BY
sl DESC
) AS Row_ID
FROM
Name
) AS A
WHERE
Row_ID = 2
ORDER BY
xzqdm
其中
select * from (select xzqdm,substring(zldwdm,1,9) xzdm,count(*) sl from sddltb_qc where xzqdm in ('130432','210604') group by xzqdm,substring(zldwdm,1,9)) as a order by xzqdm,xzdm,sl
執(zhí)行結(jié)果：
添加行序號(hào)：ROW_NUMBER () OVER (ORDER BY A.bsm ASC) AS 序號(hào)
分組添加序號(hào)：ROW_NUMBER () OVER (PARTITION BY xzqdm ORDER BY A.bsm ASC) AS 序號(hào)
補(bǔ)充：pgsql 表隨機(jī)取幾條數(shù)據(jù)
取100條
select * from map_route_info_composite order by random() limit 100
以上為個(gè)人經(jīng)驗(yàn)，希望能給大家一個(gè)參考，也希望大家多多支持腳本之家。如有錯(cuò)誤或未考慮完全的地方，望不吝賜教。
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