[英]sql statement error: "column .. does not exist"
我正在從 postgres 控制台嘗試此命令:
select sim.id as idsim,
num.id as idnum
from main_sim sim
left join main_number num on (FK_Numbers_id=num.id);
我得到了這樣的回應:
ERROR: column "fk_numbers_id" does not exist LINE 1: ...m from main_sim sim left join main_number num on (FK_Numbers...
但是如果我簡單地檢查我的表:
dbMobile=# \d main_sim
id | integer | not null default
Iccid | character varying(19) | not null
...
FK_Device_id | integer |
FK_Numbers_id | integer |
Indexes:
"main_sim_pkey" PRIMARY KEY, btree (id)
"main_sim_FK_Numbers_id_key" UNIQUE, btree ("FK_Numbers_id")
"main_sim_Iccid_key" UNIQUE, btree ("Iccid")
"main_sim_FK_Device_id" btree ("FK_Device_id")
Foreign-key constraints:
"FK_Device_id_refs_id_480a73d1" FOREIGN KEY ("FK_Device_id") REFERENCES main_device(id) DEFERRABLE INITIALLY DEFERRED
"FK_Numbers_id_refs_id_380cb036" FOREIGN KEY ("FK_Numbers_id") REFERENCES main_number(id) DEFERRABLE INITIALLY DEFERRED
...我們可以看到該列存在。
可能是語法錯誤,但我看不到什么......
任何幫助將不勝感激。 阿萊西奧
否, FK_Numbers_id
列不存在,僅存在"FK_Numbers_id"
列
顯然,您使用雙引號創建了表,因此所有列名現在都區分大小寫,您必須始終使用雙引號:
select sim.id as idsim,
num.id as idnum
from main_sim sim
left join main_number num on ("FK_Numbers_id" = num.id);
回顧一下手冊中已經記錄的內容:
foo
和FOO
列相同, "foo"
和"FOO"
列不同。
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