問題描述

我有 3 個查詢，它們從 3 個不同的表(帶連接)中獲取數(shù)據(jù)，并且它們的列名幾乎相同(或者我使用 AS 關鍵字使它們相同).完成 3 個查詢后，我想合并它們的結果，因此看起來它們來自一張表.請看下面的代碼.

I am having 3 queries, which takes data from 3 different tables (with joins) and their column names are pretty much same (or I made them same by using ASkeyword). Once the 3 queries are completed, I want to combine their results, so it looks like they are coming from one table. Please have a look at the below codes.

第一個查詢

SELECT Client_Portfolio.*,
Client.Name,
Provider.Name,
"One" AS Income_Type,
One.`One_Gross_Fee` AS "Gross_Fee",
One.`One_V_Fee` AS "V_Fee",
One.`One_E_Fee` AS "E_Fee",
One.`One_I_Fee` AS "I_Fee",
One.`One_Tax_Provision` AS "Tax_Provision",
One.`One_Net_Income` AS "Net_Income",
"N/A" AS VAT,
One.`Updated_Date`
FROM Client_Portfolio
INNER JOIN Portfolio ON Portfolio.`idPortfolio` = Client_Portfolio.`idPortfolio`
INNER JOIN Client ON Client.idClient = Client_Portfolio.idClient
JOIN Provider ON Provider.idProvider = Portfolio.idProvider
INNER JOIN One ON One.idPortfolio = Portfolio.idPortfolio

第二次查詢

SELECT Client_Portfolio.*,
Client.Name,
Provider.Name,
"Two" AS Income_Type,
Two.`Two_Gross_Fee` AS "Gross_Fee",
Two.`Two_V_Fee` AS "V_Fee",
Two.`Two_E_Fee` AS "E_Fee",
Two.`Two_I_Fee` AS "I_Fee",
Two.`Two_Tax_Provision` AS "Tax_Provision",
Two.`Two_Net_Income` AS "Net_Income",
Two.`Two_Vat` AS VAT,
Two.`Updated_Date`
FROM Client_Portfolio
INNER JOIN Portfolio ON Portfolio.`idPortfolio` = Client_Portfolio.`idPortfolio`
INNER JOIN Client ON Client.idClient = Client_Portfolio.idClient
JOIN Provider ON Provider.idProvider = Portfolio.idProvider
INNER JOIN Two ON Two.idPortfolio = Portfolio.idPortfolio

第三次查詢

SELECT Client_Portfolio.*,
Client.Name,
Provider.Name,
"Three" AS Income_Type,
Three.`Three_Gross_Fee` AS "Gross_Fee",
"N\A" AS "V_Fee",
Three.`Three_E_Fee` AS "E_Fee",
"N\A" AS "I_Fee",
Three.`Three_Tax_Provision` AS "Tax_Provision",
Three.`Three_Net_Income` AS "Net_Income",
Three.`Three_Vat` AS VAT,
Three.`Updated_Date`
FROM Client_Portfolio
INNER JOIN Portfolio ON Portfolio.`idPortfolio` = Client_Portfolio.`idPortfolio`
INNER JOIN Client ON Client.idClient = Client_Portfolio.idClient
JOIN Provider ON Provider.idProvider = Portfolio.idProvider
INNER JOIN Three ON Three.idPortfolio = Portfolio.idPortfolio

完成這些查詢后，我想合并它們的結果.這意味著，2nd Query 返回的行將附加在 1st 查詢返回的行之后. 第三個查詢返回的行將附加在 1st 查詢返回的行之后第二問.最后，我想按 Updated_Date

SELECT one_fields FROM Client_Portfolio ...
UNION
SELECT two_fields FROM Client_Portfolio ...
UNION
SELECT three_fields FROM Client_Portfolio ...

SELECT one_fields FROM Client_Portfolio ...
UNION
SELECT two_fields FROM Client_Portfolio ...
UNION
SELECT three_fields FROM Client_Portfolio ...
ORDER BY field1, field2, field3...;