MYSQL错误1060 - 重复列

Question

我该如何避免出现错误1060？

CREATE VIEW `new-query` AS 

SELECT L1.Inv_Num, L1.Line_Num, P1.Prod_SKU, P1.Prod_Descript, 
L2.Line_Num, P2.Prod_SKU, P2.Prod_Descript, P1.Brand_ID 

FROM LGLINE L1, LGLINE L2, LGPRODUCT P1, LGPRODUCT P2 

WHERE P1.Prod_Category IN ('SEALER') AND P2.Prod_Category IN ('TOP COAT'); 

Answer 1

您有两次指定的相同列名，所以您需要将列名别名为唯一名称。我只是将l1_，l2_p1_和p2_添加到不止一次出现的列中。

CREATE VIEW new-query AS 
SELECT L1.Inv_Num, L1.Line_Num l1_line num, P1.Prod_SKU p1_prod_sku, P1.Prod_Descript p1_prod_descript, L2.Line_Num l2_line num, P2.Prod_SKU p2_prod_sku, P2.Prod_Descript p2_prod_descript, P1.Brand_ID 
FROM LGLINE L1, LGLINE L2, LGPRODUCT P1, LGPRODUCT P2 
WHERE P1.Prod_Category IN ('SEALER') AND P2.Prod_Category IN ('TOP COAT');