MySQL創建表/視圖

Question

我不知道標題是否正確，但這裏是我的問題。因此，我想使用多個表中的數據（圖片如下）創建View中的視圖，這些視圖代表了幾個表中的字段（變電站，後期類型，區域，燈具類型，故障和維護）的維護情況。

這裏是表與連接：

我已經莫名其妙地管理和創建像這樣（下圖），這是我管理使用的代碼塊創建：

 CREATE OR REPLACE VIEW 
v_lamp_I 
AS 
SELECT 
lamps.id, 
substation.code AS sub_code, 
substation.name AS sub_name, 
lamps.lamp_code, 
post_type.descript AS post_ty, 
lamp_type.descript AS lamp_ty, 
area.descript AS area_name, 
rasvjeta.adress, 
DATE_FORMAT(date_maintenance, "%d.%m.%Y.") AS date_main, 
lamps.geo_long, 
lamps.geo_lat 
FROM lamps 
INNER JOIN substiation ON substiation.id = lamps.substiation_id 
INNER JOIN post_type ON post_type.id = lamps.post_type_id 
INNER JOIN lamp_type ON lamp_type.id = lamps.lamp_type_id 
INNER JOIN area ON area.id = rasvjeta.area_id 
INNER JOIN maintenance ON maintenance.lamps_id = lamps.id 

我已經設法創建視圖，但問題是與該視圖，我只能看到行/燈（sifra_lampe），這是維護，只有4.在表燈 我有24條目，並只有4條目但是，我希望看到所有24個條目，並且如果該特定燈沒有維護，則字段可以用日期格式（00-00-00或可以爲NULL）清空，並且對於維護的條目/燈I想成爲可見的日期字段。

這是檯燈與條目。

這裏是帶維護日期的視圖。正如你所看到的，只有6個條目

我想看看其餘的條目，對於沒有維護條目可以爲空或日期格式這樣（00-00-00）和燈維護日期格式可以保持不變，簡而言之，我希望看到所有條目不僅僅是維護的條目。謝謝你，對於長期的問題感到抱歉。我不知道如何構建有意義和短小的問題，因此寫下了一切。

Answer 1

create or replace view 
v_lamp_I as 
SELECT lamps.id, 
substation.code AS sub_code, 
substation.name AS sub_name, 
lamps.lamp_code, 
post_type.descript AS post_ty, 
lamp_type.descript AS lamp_ty, 
area.descript AS area_name, 
rasvjeta.adress, 
lamps.geo_long, 
lamps.geo_lat 
FROM lamps 
INNER JOIN substiation ON substiation.id = lamps.substiation_id 
INNER JOIN post_type ON post_type.id = lamps.post_type_id 
INNER JOIN lamp_type ON lamp_type.id = lamps.lamp_type_id 
INNER JOIN area ON area.id = rasvjeta.area_id; 


CREATE OR REPLACE VIEW 
v_lamp_new 
AS 
select v_lamp_I.*,DATE_FORMAT(date_maintenance, "%d.%m.%Y.") AS date_main 
from v_lamp_I 
LEFT JOIN maintenance ON v_lamp_I.id = maintenance.lamps_id; 

Answer 2

CREATE OR REPLACE VIEW 
v_lamp_I 
AS 
select tbl_lamp.*,DATE_FORMAT(date_maintenance, "%d.%m.%Y.") AS date_main 
from (SELECT lamps.id, 
substation.code AS sub_code, 
substation.name AS sub_name, 
lamps.lamp_code, 
post_type.descript AS post_ty, 
lamp_type.descript AS lamp_ty, 
area.descript AS area_name, 
rasvjeta.adress, 
lamps.geo_long, 
lamps.geo_lat 
FROM lamps 
INNER JOIN substiation ON substiation.id = lamps.substiation_id 
INNER JOIN post_type ON post_type.id = lamps.post_type_id 
INNER JOIN lamp_type ON lamp_type.id = lamps.lamp_type_id 
INNER JOIN area ON area.id = rasvjeta.area_id) as tbl_lamp 
LEFT JOIN maintenance ON tbl_lamp.id = maintenance.lamps_id