我需要UNION ALL多个表。我通过PHP创建一个查询，并在没有UNION ALL表的情况下成功运行。但是当我UNION ALL 2表时，似乎查询永远不会在php页面中结束，我也在pgAdmin中测试了相同的结果。我通过shell生成了一个CSV文件，获取了我想要选择的数据，但查询也永远不会结束。我将不胜感激。提前谢谢。
这是UNION ALL多个表的查询。可以是UNION ALL的表的数量取决于DateRangePicker。所以每天都有一张表，例如：F_UCell_1_170123，F_UCell_1_170124，F_UCell_1_170125，F_UCell_1_170126等......
SELECT
to_date(T1.day::text,'YYYYMMDD'),
T1.hour,
cellname,
Item67204837, Item73393830, ... , (199 columns listed in 7 tables listed below)
FROM (
SELECT
day,
hour,
Cellkey,
Item67204837, Item67199736
FROM omstar_1486079935913_xsau.F_UCell_1_170123
UNION ALL
SELECT
day,
hour,
Cellkey,
Item67204837, Item67199736
FROM omstar_1486079935913_xsau.F_UCell_1_170124)
AS T1
INNER JOIN (
SELECT
day,
hour,
Cellkey,
Item67183903, Item67180586, Item67183900, Item67180589, Item67180588, Item67180590, Item67183901, Item67180587, Item67183913, Item67183912, Item67180585
FROM omstar_1486079935913_xsau.F_UCell_2_170123
UNION ALL
SELECT
day,
hour,
Cellkey,
Item67183903, Item67180586, Item67183900, Item67180589, Item67180588, Item67180590, Item67183901, Item67180587, Item67183913, Item67183912, Item67180585
FROM omstar_1486079935913_xsau.F_UCell_2_170124)
AS T2 ON
T1.day = T2.day AND
T1.hour = T2.hour AND
T1.Cellkey = T2.Cellkey
INNER JOIN (
SELECT
day,
hour,
Cellkey,
Item73394021, Item67190477, Item73394022, Item67189750, Item67190411, Item67189749, Item73425007, Item67189756, Item67189757, Item73425013, Item73394018, Item67193405, Item67189754, Item67190476, Item67192661, Item67193406, Item67192660, Item73425009, Item67189755, Item73426857, Item67190412, Item73425012, Item73426856, Item73425008, Item73423107
FROM omstar_1486079935913_xsau.F_UCell_3_170123
UNION ALL
SELECT day, hour, Cellkey, Item73394021, Item67190477, Item73394022, Item67189750, Item67190411, Item67189749, Item73425007, Item67189756, Item67189757, Item73425013, Item73394018, Item67193405, Item67189754, Item67190476, Item67192661, Item67193406, Item67192660, Item73425009, Item67189755, Item73426857, Item67190412, Item73425012, Item73426856, Item73425008, Item73423107
FROM omstar_1486079935913_xsau.F_UCell_3_170124)
AS T3 ON
T1.day = T3.day AND
T1.hour = T3.hour AND
T1.Cellkey = T3.Cellkey
INNER JOIN (
SELECT day, hour, Cellkey, Item67193538, Item67190406, Item67193542, Item67179830, Item67192612, Item67193613, Item67190506, Item67179858, Item67193611, Item73403809, Item73424888, Item67179825, Item67193543, Item67189494, Item67189496, Item67193539, Item67193540, Item67180083, Item67180081, Item67190457, Item73424884, Item67190840, Item73393835, Item67180078, Item67189568, Item67179967, Item73393837, Item67180077, Item67180079, Item67193537, Item67190505, Item67189557, Item73424885, Item67180067, Item73426209, Item73394298, Item73423519, Item67190461, Item67192613, Item67180082, Item67179777, Item67190409, Item67203416, Item67179780, Item67180074, Item67180069, Item67179930, Item67189572, Item67180076, Item67190841, Item67190408, Item73424887, Item67193541, Item73393836, Item67193612, Item73424889, Item67180080, Item67192610, Item67192611, Item67193614, Item67190407, Item67179827, Item73424886, Item67180068, Item67193536, Item67179864, Item67179922, Item67179925, Item67179778, Item67179926, Item67179781, Item67179927, Item67179826, Item67179921, Item67179928, Item67179924, Item67179828, Item67179923, Item67179779,
FROM omstar_1486079935913_xsau.F_UCell_4_170123
UNION ALL
SELECT day, hour, Cellkey, Item67193538, Item67190406, Item67193542, Item67179830, Item67192612, Item67193613, Item67190506, Item67179858, Item67193611, Item73403809, Item73424888, Item67179825, Item67193543, Item67189494, Item67189496, Item67193539, Item67193540, Item67180083, Item67180081, Item67190457, Item73424884, Item67190840, Item73393835, Item67180078, Item67189568, Item67179967, Item73393837, Item67180077, Item67180079, Item67193537, Item67190505, Item67189557, Item73424885, Item67180067, Item73426209, Item73394298, Item73423519, Item67190461, Item67192613, Item67180082, Item67179777, Item67190409, Item67203416, Item67179780, Item67180074, Item67180069, Item67179930, Item67189572, Item67180076, Item67190841, Item67190408, Item73424887, Item67193541, Item73393836, Item67193612, Item73424889, Item67180080, Item67192610, Item67192611, Item67193614, Item67190407, Item67179827, Item73424886, Item67180068, Item67193536, Item67179864, Item67179922, Item67179925, Item67179778, Item67179926, Item67179781, Item67179927, Item67179826, Item67179921, Item67179928, Item67179924, Item67179828, Item67179923, Item67179779, Item67179782
FROM omstar_1486079935913_xsau.F_UCell_4_170124)
AS T4 ON
T1.day = T4.day AND
T1.hour = T4.hour AND
T1.Cellkey = T4.Cellkey
INNER JOIN (
SELECT
day,
hour,
Cellkey,
Item67199780, Item73423508, Item67190405, Item73423488, Item73423498, Item67179331, Item67199680, Item67199619, Item67179527, Item67179462, Item73423506, Item67190586, Item67204827, Item73423510, Item67192609, Item67190401, Item67179465, Item67180641, Item67179459, Item67179336, Item67179464, Item73423490, Item67193609, Item73423502, Item73410511, Item67179338, Item73423486, Item67190404, Item67179457, Item67193610, Item67179299, Item73423504, Item67199625, Item67199623, Item67179332, Item67199556, Item73423494, Item67199621, Item73423496, Item67199624, Item67179466, Item67179460, Item67180642, Item67190621, Item67179329, Item67199620, Item73423492, Item67204826, Item67179337, Item67199682, Item73425032, Item67179334, Item67199622, Item67180648, Item67192608, Item67179525, Item73410510, Item67179524
FROM omstar_1486079935913_xsau.F_UCell_5_170123
UNION ALL
SELECT
day,
hour,
Cellkey,
Item67199780, Item73423508, Item67190405, Item73423488, Item73423498, Item67179331, Item67199680, Item67199619, Item67179527, Item67179462, Item73423506, Item67190586, Item67204827, Item73423510, Item67192609, Item67190401, Item67179465, Item67180641, Item67179459, Item67179336, Item67179464, Item73423490, Item67193609, Item73423502, Item73410511, Item67179338, Item73423486, Item67190404, Item67179457, Item67193610, Item67179299, Item73423504, Item67199625, Item67199623, Item67179332, Item67199556, Item73423494, Item67199621, Item73423496, Item67199624, Item67179466, Item67179460, Item67180642, Item67190621, Item67179329, Item67199620, Item73423492, Item67204826, Item67179337, Item67199682, Item73425032, Item67179334, Item67199622, Item67180648, Item67192608, Item67179525, Item73410510, Item67179524
FROM omstar_1486079935913_xsau.F_UCell_5_170124)
AS T5 ON
T1.day = T5.day AND
T1.hour = T5.hour AND
T1.Cellkey = T5.Cellkey
INNER JOIN (
SELECT
day,
hour,
Cellkey,
Item67180483, Item67180498, Item67180508, Item67192689, Item67180484, Item67180491, Item67180490, Item67180509, Item67180499
FROM omstar_1486079935913_xsau.F_UCell_6_170123
UNION ALL
SELECT
day,
hour,
Cellkey,
Item67180483, Item67180498, Item67180508, Item67192689, Item67180484, Item67180491, Item67180490, Item67180509, Item67180499
FROM omstar_1486079935913_xsau.F_UCell_6_170124)
AS T6 ON
T1.day = T6.day AND
T1.hour = T6.hour AND
T1.Cellkey = T6.Cellkey
INNER JOIN (
SELECT
day,
hour,
Cellkey,
Item67189840, Item67192114, Item67203850, Item67192486, Item67190567, Item67192115, Item67192487, Item67190704, Item73403763, Item73393832, Item73403761, Item67190705, Item67202932, Item73393830
FROM omstar_1486079935913_xsau.F_UCell_8_170123
UNION ALL
SELECT
day,
hour,
Cellkey,
Item67189840, Item67192114, Item67203850, Item67192486, Item67190567, Item67192115, Item67192487, Item67190704, Item73403763, Item73393832, Item73403761, Item67190705, Item67202932, Item73393830
FROM omstar_1486079935913_xsau.F_UCell_8_170124)
AS T7 ON
T1.day = T7.day AND
T1.hour = T7.hour AND
T1.Cellkey = T7.Cellkey
INNER JOIN
omstar_1486079935913_xsau.d_ucell as Tn on T1.cellkey = Tn.cellkey
WHERE Cellname IN ('U06CZPA' ) ORDER BY T1.day, T1.hour;
列分布在F_UCell_1或F_UCell_2或......或F_UCell_6或F_UCell_8中。 缺少F_UCell_7 （按INNER JOIN加入的共7个表格）
答案 0 :(得分：0)
@alex_edev，我现在正在测试，只用一列就能正常工作，所以这是一个性能问题。此外，我在同一局域网中有不同的服务器（1个用于网页，另一个用于DB服务器）。所有列的结果大约为150 MB，因此可能是网络问题。 @Ben H，表的设计之前已经设计了一个已经有数据，所以重新设计表不是一个选项。