Update ch04: 集合运算.md

2022-03-23 08:50:09 +08:00
parent d1ddd3705b
commit 2b16104739
1 changed files with 1 additions and 1 deletions
--- a/集合运算.md
+++ b/集合运算.md
@@ -245,7 +245,7 @@ SELECT *
 WHERE sale_price > 2000 
   AND product_id NOT IN (SELECT product_id 
                            FROM Product 
-                           WHERE sale_price<1.3*purchase_price)
+                           WHERE sale_price >= 1.3*purchase_price)
 ```

 ### 4.1.4.3 INTERSECT 与 AND 谓词