INSERT INTO sql 查询未定义工作列

Question

def self.create_tables
  connection = PG.connect(dbname: 'clients')
  connection.exec('CREATE TABLE client_details (
                Company_ID SERIAL PRIMARY KEY,
                Company_Name text,
                Company_Telephone text,
                Company_Representitive text,
                Company_Email text,
                Company_Address text,
                Company_Contract_Start_Date text,
                Company_Contract_End_Date text
                )')
end
def self.create_table_data
  connection = PG.connect(dbname: 'clients')
  connection.exec('INSERT INTO client_detail (
  Company_Name,
  Company_Telephone,
  Company_Representitive,
  Company_Email,
  Company_Address,
  Company_Contract_Start_Date,
  Company_Contract_End_Date) 
  VALUES (
  "Monoprix", 
  "1234", 
  "sarah", 
  "dan@dan.com", 
  "this road", 
  "12", 
  "13");')
end

当我运行第一个函数工作时，当我运行第二个函数时我得到一个错误：

Traceback (most recent call last):
         2: from lib/data_generator.rb:22:in `<main>'
         1: from lib/data_generator.rb:6:in `create_table_data'
    lib/data_generator.rb:6:in `async_exec': ERROR:  column"monoprix" does not exist (PG::UndefinedColumn)
    LINE 1: ...act_Start_Date,Company_Contract_End_Date) VALUES (Monoprix, ...
                                                                    ^

我不知道为什么当我尝试将值 'monoprix' 插入到列 Company_Name 时，错误告诉我列 'monoprix' 不存在，而不是 'monoprix'.

但是，当我插入 VALUES 1,2,3,4,5,6,7 时它工作正常。

我被难住了。

我想将 'monoprix' 插入列 'Company_Name'。

Answer 1

您的错误来自字符串中的 " 个引号。根据 Mike 的回答，您需要使用反斜杠来分隔它们，或者使用字符串中的单个反斜杠和双斜杠来分隔字符串本身，就像我在下面所做的那样。再次尝试用单引号替换它们：'

def self.create_tables
  connection = PG.connect(dbname: 'clients')
  connection.exec('CREATE TABLE client_details (
                Company_ID SERIAL PRIMARY KEY,
                Company_Name text,
                Company_Telephone text,
                Company_Representitive text, 
                    Company_Email text,
                Company_Address text,
                Company_Contract_Start_Date text,
                Company_Contract_End_Date text
                )')
end
def self.create_table_data
  connection = PG.connect(dbname: 'clients')
  connection.exec("INSERT INTO client_detail (
  Company_Name,
  Company_Telephone,
  Company_Representitive,
  Company_Email,
  Company_Address,
  Company_Contract_Start_Date,
  Company_Contract_End_Date) 
  VALUES (
  'Monoprix', 
  '1234', 
  'sarah', 
  'dan@dan.com', 
  'this road', 
  '12', 
  '13');")
end

Answer 2

你试过这个吗：

def self.create_tables
  connection = PG.connect(dbname: 'clients')
  connection.exec('CREATE TABLE client_details (
                Company_ID SERIAL PRIMARY KEY,
                Company_Name text,
                Company_Telephone text,
                Company_Representitive text,
                Company_Email text,
                Company_Address text,
                Company_Contract_Start_Date text,
                Company_Contract_End_Date text
                )')
end
def self.create_table_data
  connection = PG.connect(dbname: 'clients')
  connection.exec('INSERT INTO client_detail (
  Company_Name,
  Company_Telephone,
  Company_Representitive,
  Company_Email,
  Company_Address,
  Company_Contract_Start_Date,
  Company_Contract_End_Date) 
  VALUES (
  \'Monoprix\', 
  \'1234\', 
  \'sarah\', 
  \'dan@dan.com\', 
  \'this road\', 
  \'12\', 
  \'13\');')
end

看起来很蠢，但必须勾选所有明显的方框。

INSERT INTO sql 查询未定义工作列

INSERT INTO sql query not working column undefined

ruby

sql

postgresql

pg