insert - PostgreSQL sql命令错误列 'does not exist'

Question

dxdb=> \d dxtest_loadprofiletosale
                            Table "public.dxtest_loadprofiletosale"
   Column    |   Type   |                               Modifiers                               
-------------+----------+-----------------------------------------------------------------------
 id          | integer  | not null default nextval('dxtest_loadprofiletosale_id_seq'::regclass)
 TransDate   | date     | 
 IssueDate   | date     | 
 CustomerNum | smallint | not null
Indexes:
    "dxtest_loadprofiletosale_pkey" PRIMARY KEY, btree (id)

dxdb=> INSERT INTO dxtest_loadprofiletosale(id, TransDate, IssueDate, CustomerNum) VALUES(1, '2015-03-04','2015-01-01',01);
ERROR:  column "transdate" of relation "dxtest_loadprofiletosale" does not exist
LINE 1: INSERT INTO dxtest_loadprofiletosale(id, TransDate, IssueDat...

请问，我已有“transdate”列，为什么它说不存在？

Answer 1

您的列名为“TransDate”，而不是transdate。您使用双引号作为列名称创建了表，这使得它们区分大小写，并且您必须始终使用双引号:

INSERT INTO dxtest_loadprofiletosale
  (id, "TransDate", "IssueDate", "CustomerNum") 
VALUES
  (1, '2015-03-04','2015-01-01',01);

有关 SQL 标识符的更多详细信息，请参阅手册:
http://www.postgresql.org/docs/current/static/sql-syntax-lexical.html#SQL-SYNTAX-IDENTIFIERS

一般来说，最好永远不要使用双引号 - 从长远来看，它会给您带来更少的麻烦。