If a text index has multiple fields in Mongo, how can I do a search in only one field since the weig ...
If a text index has multiple fields in Mongo, how can I do a search in only one field since the weig ...
QueryWrapper<User> queryWrapper = new QueryWrapper<>(); if (!StringUtils.isEmpty(ke ...
select id from table where (num,name) in ((num1,'name1'),(num2,'name2')) ...
MySql多個字段關鍵字分詞模糊查詢,按照最佳匹配度排序,使用LOCATE函數SELECT DISTINCT t.*FROM pub_course tLEFT JOIN course_tag t1 ON ( t1.entitytype = t.type AND t1.entityid = t.id ...
$query = '{ "$and": [ {"$or": [{"reported": {"$exists": false}}, {"reported": 0}] ...
同我上一篇,就是添加`符號, eg:那么要在desc的左右兩面加上一個反引號 ` (就是鍵盤上ESC下面的那個) select id,name,`desc` from test ...
開始以為日期問題沒加函數,查看了:`year_month` varchar(8) DEFAULT NULL COMMENT '年月',類型為字符串,真是一臉懵逼 結果:因為查詢字段與關鍵字重名,所以須使用別名引用。就像寫python一樣,命名的def函數與模塊 ...
我還是先把代碼貼上來吧 select be.ua , u.`name`, be.time_stamp, uvv.fans_count, uvv.friends_count, uvv.attet ...