28 lines
1023 B
Markdown
28 lines
1023 B
Markdown
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SHOW STATS
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==========
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Synopsis
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--------
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``` sql
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SHOW STATS FOR table
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SHOW STATS FOR ( SELECT * FROM table [ WHERE condition ] )
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```
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Description
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-----------
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Returns approximated statistics for the named table or for the results of a (limited) query.
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Statistics are returned for each column, along with a summary row.
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| Column | Description |
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| ------------------------- | --------------------------------------- |
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| `column_name` | The name of the column (`NULL` for the summary row)|
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| `data_size` | The total size in bytes of all of the values in the column|
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| `distinct_values_count` | The number of distinct values in the column|
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| `nulls_fractions` | The portion of the values in the column that are `NULL`|
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| `row_count` | The number of rows (only returned for the summary row)|
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| `low_value` | The lowest value found in this column (only for some types)|
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| `high_value` | The highest value found in this column (only for some types)| |