54 lines
969 B
Markdown
54 lines
969 B
Markdown
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## `MV_CONCAT` [esql-mv_concat]
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**Syntax**
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:::{image} ../../../../../images/mv_concat.svg
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:alt: Embedded
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:class: text-center
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:::
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**Parameters**
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`string`
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: Multivalue expression.
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`delim`
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: Delimiter.
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**Description**
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Converts a multivalued string expression into a single valued column containing the concatenation of all values separated by a delimiter.
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**Supported types**
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| string | delim | result |
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| --- | --- | --- |
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| keyword | keyword | keyword |
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| keyword | text | keyword |
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| text | keyword | keyword |
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| text | text | keyword |
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**Examples**
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```esql
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ROW a=["foo", "zoo", "bar"]
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| EVAL j = MV_CONCAT(a, ", ")
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```
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| a:keyword | j:keyword |
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| --- | --- |
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| ["foo", "zoo", "bar"] | "foo, zoo, bar" |
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To concat non-string columns, call [`TO_STRING`](../../esql-functions-operators.md#esql-to_string) first:
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```esql
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ROW a=[10, 9, 8]
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| EVAL j = MV_CONCAT(TO_STRING(a), ", ")
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```
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| a:integer | j:keyword |
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| --- | --- |
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| [10, 9, 8] | "10, 9, 8" |
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