转载网址:
https://blog.csdn.net/mp624183768/article/details/121696040?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_baidulandingword~default-0-121696040-blog-127103285.pc_relevant_3mothn_strategy_and_data_recovery&spm=1001.2101.3001.4242.1&utm_relevant_index=3
locate("字符串",`字段名`)
判断字段名中是否包含另一个字符串
如果包含则返回一个int数值并且>0,不存在则返回0
