SQL查詢多個表

Question

我有4個表，一個是veg_tech其結構

CREATE TABLE IF NOT EXISTS `veg_tech` (
`VEG_TECH_ID` int(11) NOT NULL, 
    `VALI` varchar(100) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL, 
    `JAAT` varchar(100) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL, 
    `BOR_ID` int(11) NOT NULL, 
    `FERTILIZER_KG_ROP_ID` int(11) NOT NULL, 
    `BOR_DISTANCE_ID` int(11) NOT NULL, 
    `BEW_BARNA_DAR` varchar(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci NOT NULL 
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=2 ; 

目前，BOR_ID，FERTILIZER_KG_ROP_ID和DOR_DISTANCE_ID外鍵，現在國外的表有數據量太大了，我想顯示此表中的所有數據以及其他表中的所有數據。可能有人幫助

Answer 1

只需使用一個連接：

SELECT * 
FROM 'veg_tech' v 
LEFT JOIN table_2 t2 ON v.BOR_ID= t2.BOR_ID 
LEFT JOIN table_3 t3 ON v.FERTILIZER_KG_ROP_ID = t.FERTILIZER_KG_ROP_ID 
LEFT JOIN table_4 t4 ON v.DOR_DISTANCE_ID = t4.DOR_DISTANCE_ID ;