From 6c27090c55a57fa1e05a5789d27cc7d80c4c7c65 Mon Sep 17 00:00:00 2001 From: yk Date: Thu, 7 Dec 2023 10:29:16 +0800 Subject: [PATCH] fix --- content/posts/mysql/mysql_1.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/content/posts/mysql/mysql_1.md b/content/posts/mysql/mysql_1.md index 784cbd5..dea8783 100644 --- a/content/posts/mysql/mysql_1.md +++ b/content/posts/mysql/mysql_1.md @@ -388,4 +388,4 @@ select * from emp, dept where emp.deptno = dept.deptno; select id, emp.deptno from emp, dept where emp.deptno = dept.deptno; ``` -> 过滤笛卡尔集的 where 筛选条件，必须比查询表的数量大 +> 过滤笛卡尔集的 where 筛选条件，`不能少于表的数量-1`，否则会出现笛卡尔集