sql拆分日期字符串data_prid_desc（20181111-20181112）
如：拆分成开始时间exe_bgn_time120181111，结束时间exe_end_time120181112
substring_index(s.data_prid_desc, '-', 1) AS exe_bgn_time1
substring_index(s.data_prid_desc,'-', -1) AS exe_end_time1
sql拆分日期字符串（20181111-20181112）
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转载自blog.csdn.net/weixin_40197494/article/details/83997690
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