多行假设我有一个表是这样的: subject | flag
----------------+------
this is a test | 2
subject是text类型,flag是int类型。我想在这个Postgres的表转换为这样的事: token | flag
----------------+------
this | 2
is | 2
a | 2
我在postgreSQL上有一组返回函数,例如 CREATE FUNCTION set_ret_func(foo int, bar int)
RETURNS TABLE(total bigint, result bigint) AS $$
SELECT a.val + $1 as total, b.val + $2 as result
FROM a, b
$
我收到的错误: set-valued function called in context that cannot accept a set 在 RETURN QUERY EXECUTE行执行此功能时 : PLSQL $ cat lookup_email.pl
CREATE OR REPLACE FUNCTION app.lookup_email(ident_id bigint,sess big
我正在使用filled_months填充空白月份和按月分组数据。问题是我似乎无法让它查询部分月份(例如2016-09-01至2016-09-15),它总是计算整个月份。有人能指引我朝着正确的方向吗? with filled_months AS
(SELECT
month,
0 AS blank_count
FROM generate_series(dat
我想用2个参数创建一个函数。这是我的SELECT声明: SELECT CASE
WHEN duration <= 10000000 THEN '00-01 sec'
WHEN duration <= 40000000 THEN '01-04 sec'
WHEN duration <= 100000000 THEN '04-10 sec'
WHEN
为什么当多维数组中只有一个多维元素时返回2条记录images? SELECT images
FROM (
SELECT images, generate_subscripts(images, 2) AS s
FROM listings
WHERE listings.id = 2
) as foo;
注:我缩短了base64字符串以便于查看。 id
尝试创建一个函数,如果searchTerm存在于其中一列内的任何位置,则该函数将从表中返回多行。 (我是新来的Postgres。) CREATE OR REPLACE FUNCTION dts_getProjects(searchTerm TEXT) RETURNS SETOF project
AS $$
SELECT credit_br AS Branch, status FROM jo