MySQL/Hive/Presto/Impala Transposition
Rows to Columns Rows to Comma Separated String
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FROM: +-----+-----+ | uid | tag | +-----+-----+ | 1 | 1 | | 1 | 2 | | 1 | 3 | | 2 | 1 | | 2 | 4 | | 3 | 5 | +-----+-----+ TO: +-----+----------+ | uid | tag_list | +-----+----------+ | 1 | 1,2,3 | | 2 | 1,4 | | 3 | 5 | +-----+----------+ |
MySQL Use GROUP_CONCAT(). This function also works in Infobright. Incoming search terms:transpose row to column in impalapresto concatgroup concat hivehive group concatHIVE group_concatpresto concat_wshive transpose columns to rowshive transpose column to rowgroup_concat in hivegroup concat prestoArgument 2 of function CONCAT_WS must be string or array<string> but … Continue reading “MySQL/Hive/Presto/Impala Transposition”