hive 行转列，hive转列
用max（if()）将行转换列
表
flag
ret_1
ret_3
ret_7
max(if (flag = 'ret_1', ret_user, NULL)) as ret1_user,
max(if (flag = 'ret_3', ret_user, NULL)) as ret3_user,
max(if (flag = 'ret_7', ret_user, NULL)) as ret7_user
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hive 行转列，hive转列 用max（if()）将行转换列 表 flag ret_1 ret_3 ret_7 max(if (flag = 'ret_1', ret_user, NULL)) as ret1_user, max(if (flag = 'ret_3', ret_user, NULL)) as ret3_user, max(if (flag = 'ret_7', ret_user, NULL))...
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