多行假設我有一個表是這樣的: subject | flag
----------------+------
this is a test | 2
subject是text類型,flag是int類型。我想在這個Postgres的錶轉換爲這樣的事: token | flag
----------------+------
this | 2
is | 2
a | 2
我在postgreSQL上有一組返回函數,例如 CREATE FUNCTION set_ret_func(foo int, bar int)
RETURNS TABLE(total bigint, result bigint) AS $$
SELECT a.val + $1 as total, b.val + $2 as result
FROM a, b
$
我收到的錯誤: set-valued function called in context that cannot accept a set 在 RETURN QUERY EXECUTE行執行此功能時 : PLSQL $ cat lookup_email.pl
CREATE OR REPLACE FUNCTION app.lookup_email(ident_id bigint,sess big
我正在使用filled_months填充空白月份和按月分組數據。問題是我似乎無法讓它查詢部分月份(例如2016-09-01至2016-09-15),它總是計算整個月份。有人能指引我朝着正確的方向嗎? with filled_months AS
(SELECT
month,
0 AS blank_count
FROM generate_series(dat
我想用2個參數創建一個函數。這是我的SELECT聲明: SELECT CASE
WHEN duration <= 10000000 THEN '00-01 sec'
WHEN duration <= 40000000 THEN '01-04 sec'
WHEN duration <= 100000000 THEN '04-10 sec'
WHEN
爲什麼當多維數組中只有一個多維元素時返回2條記錄images? SELECT images
FROM (
SELECT images, generate_subscripts(images, 2) AS s
FROM listings
WHERE listings.id = 2
) as foo;
注:我縮短了base64字符串以便於查看。 id
嘗試創建一個函數,如果searchTerm存在於其中一列內的任何位置,則該函數將從表中返回多行。 (我是新來的Postgres。) CREATE OR REPLACE FUNCTION dts_getProjects(searchTerm TEXT) RETURNS SETOF project
AS $$
SELECT credit_br AS Branch, status FROM jo