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74 lines
1.9 KiB
Markdown
74 lines
1.9 KiB
Markdown
---
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slug: /en/sql-reference/table-functions/format
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sidebar_position: 56
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sidebar_label: format
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---
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# format
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Extracts table structure from data and parses it according to specified input format.
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**Syntax**
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``` sql
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format(format_name, data)
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```
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**Parameters**
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- `format_name` — The [format](../../interfaces/formats.md#formats) of the data.
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- `data` — String literal or constant expression that returns a string containing data in specified format
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**Returned value**
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A table with data parsed from `data` argument according specified format and extracted schema.
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**Examples**
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**Query:**
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``` sql
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:) select * from format(JSONEachRow,
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$$
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{"a": "Hello", "b": 111}
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{"a": "World", "b": 123}
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{"a": "Hello", "b": 112}
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{"a": "World", "b": 124}
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$$)
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```
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**Result:**
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```text
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┌───b─┬─a─────┐
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│ 111 │ Hello │
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│ 123 │ World │
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│ 112 │ Hello │
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│ 124 │ World │
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└─────┴───────┘
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```
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**Query:**
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```sql
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:) desc format(JSONEachRow,
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$$
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{"a": "Hello", "b": 111}
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{"a": "World", "b": 123}
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{"a": "Hello", "b": 112}
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{"a": "World", "b": 124}
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$$)
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```
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**Result:**
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```text
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┌─name─┬─type──────────────┬─default_type─┬─default_expression─┬─comment─┬─codec_expression─┬─ttl_expression─┐
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│ b │ Nullable(Float64) │ │ │ │ │ │
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│ a │ Nullable(String) │ │ │ │ │ │
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└──────┴───────────────────┴──────────────┴────────────────────┴─────────┴──────────────────┴────────────────┘
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```
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**See Also**
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- [Formats](../../interfaces/formats.md)
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