update 2.7.3

2022-07-29 15:40:34 +08:00
parent 833ff7e1db
commit bfc102e80e
1 changed files with 1 additions and 1 deletions
--- a/基础查询与排序.md
+++ b/基础查询与排序.md
@@ -600,7 +600,7 @@ SELECT * FROM user
 ORDER BY !ISNULL(name) ASC,name DESC;
 ```

-![图片](./img/ch02/ch02.07_null_first2.jpg)   ![图片](./img/ch02/ch02.07_null_first2.jpg)
+![图片](./img/ch02/ch02.07_null_first2.jpg)   ![图片](./img/ch02/ch02.07_null_first3.jpg)

 上述语句先使用 `!ISNULL(name)` 字段进行升序排列，而只有当 `name` 列值不为 `NULL` 时，`!ISNULL(name)` 才为真，所以其排到说行，而 `name DESC` 则实现了 `非NULL` 值降序排列。