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Update order-by.md

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Mikhail 2021-07-26 07:17:29 +03:00
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docs/en/sql-reference/statements/select/order-by.md
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@ -280,7 +280,7 @@ To fill multiple columns, add `WITH FILL` modifier with optional parameters afte
ORDER BY expr [WITH FILL] [FROM const_expr] [TO const_expr] [STEP const_numeric_expr], ... exprN [WITH FILL] [FROM expr] [TO expr] [STEP numeric_expr]
```
`WITH FILL` can be applied only for fields with Numeric (all kind of float, decimal, int) or Date/DateTime types.
`WITH FILL` can be applied only for fields with Numeric (all kind of float, decimal, int) or Date/DateTime types. When applied for `String` fields, missed values will be filled with empty strings.
When `FROM const_expr` not defined sequence of filling use minimal `expr` field value from `ORDER BY`.
When `TO const_expr` not defined sequence of filling use maximum `expr` field value from `ORDER BY`.
When `STEP const_numeric_expr` defined then `const_numeric_expr` interprets `as is` for numeric types as `days` for Date type and as `seconds` for DateTime type.