This question already has answers here: Conditional operator cannot cast implicitly? (3 answers) Closed 9 years ago.
目录1. Django ORM id__startswith 查询变慢问题原因解决优化前优化后2. mysql 模糊匹配简介用法带有 “%” 通配符的查询例 1例 2例 3带有“_”通配符的查询例 1LIKE 区分大小写例 13. 拓展总结