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fixes for tuple.md

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Ivan Blinkov 2018-09-06 20:01:06 +03:00
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docs/en/data_types/tuple.md
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# Tuple(T1, T2, ...) # Tuple(T1, T2, ...)
A tuple of elements of any [type](index.md#data_types). There can be one or more types of elements in a tuple. A tuple of elements, each having an individual [type](index.md#data_types).
You can't store tuples in tables (other than Memory tables). They are used for temporary column grouping. Columns can be grouped when an IN expression is used in a query, and for specifying certain formal parameters of lambda functions. For more information, see the sections [IN operators](../query_language/select.md#in_operators) and [Higher order functions](../query_language/functions/higher_order_functions.md#higher_order_functions). You can't store tuples in tables (other than Memory tables). They are used for temporary column grouping. Columns can be grouped when an IN expression is used in a query, and for specifying certain formal parameters of lambda functions. For more information, see the sections [IN operators](../query_language/select.md#in_operators) and [Higher order functions](../query_language/functions/higher_order_functions.md#higher_order_functions).
@ -10,7 +10,7 @@ Tuples can be the result of a query. In this case, for text formats other than J
## Creating a tuple ## Creating a tuple
You can use a function to create a tuple You can use a function to create a tuple:
``` ```
tuple(T1, T2, ...) tuple(T1, T2, ...)
@ -39,7 +39,7 @@ When creating a tuple on the fly, ClickHouse automatically detects the type of e
Example of automatic data type detection: Example of automatic data type detection:
``` ```
SELECT tuple(1,NULL) AS x, toTypeName(x) SELECT tuple(1, NULL) AS x, toTypeName(x)
SELECT SELECT
(1, NULL) AS x, (1, NULL) AS x,