【MapSheep】
[好记性不如烂笔头]
posts - 228,comments - 15,views - 17万
03 2024 档案
MySQL dual表（自带表 使用）
摘要：MySQL dual（自带表） select '张三' as '变量1', (select s_name from Student where s_sex = '男' LIMIT 1) as '变量2', 2 as '变量3', null from dual; 阅读全文
posted @ 2024-03-14 11:55 (Play) 阅读(50) 评论(0) 推荐(0) 编辑


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