clickhouseUsing groupArray in queries
SELECT date, groupArray(col) FROM tbl GROUP BY datectrl + ctbltable to select data from | datecolumn to group by |
groupArraywill group all column values into an array | colcolumn which values to group into an array |
Usage example
SELECT date, groupArray(col) FROM tbl GROUP BY dateoutput
┌───────date─┬─groupArray(col)─────────────────────────────────────────────────────────────────────────────┐
│ 1970-01-01 │ ['hi','Donald','hi','Donald','hi','Donald','hi','Donald','hi','Donald'] │
│ 2022-01-07 │ ['Donald','Donald','Donald','Donald','Donald','Donald','Donald','Donald','Donald','Donald'] │
│ 2022-01-10 │ ['Donald','Donald','Donald','Donald','Donald'] │
│ 2022-01-11 │ ['Donald','Donald','Donald','Donald','Donald','Donald','Donald','Donald','Donald','Donald'] │
│ 2022-01-12 │ ['Donald','Donald','Donald','Donald','Donald'] │
│ 2022-01-14 │ ['hi','good'] │
└────────────┴─────────────────────────────────────────────────────────────────────────────────────────────┘
More of Clickhouse
- Convert datetime to unix timestamp
- Convert hex to text
- Select countIf usage example
- Add row number to results
- Create table example
- String concat
- List all tables from all database
- Select rows with certain value in array column
- Select where date column is between dates
- Insert array of strings in CSV format
See more codes...