摘要:
1.查询表有多少条记录select count(*) from table;2.查询表中符合条件的记录数select count(*) from table where id > 100;3.查询每个分组的记录数select name, count(*) as count from table gr 阅读全文
摘要:
$(document).on('change','#citys_id',function () { var id = $('#citys_id').val(); // 城市ID var country_id = $('#quanpost-country_id').val(); var _this = 阅读全文