mysql的GROUP_CONCAT给每个值加上单引号后再拼接
解决方法：
SELECT GROUP_CONCAT('''',e.em_id,'''') em_ids from db_call_admin.tb_call_employe e
结果：'134','135','129','139','130','128','131','133','137','132','136','138'
SELECT GROUP_CONCAT(e.em_id) em_ids from db_call_admin.tb_call_employe e
结果：134,135,129,139,130,128,131,133,137,132,136,138
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