# `!` Enkey, Unkey

_Simple to keyed table and vice-versa_


## `!` Enkey

_Make a keyed table from a simple table._
```syntax
i!t    ![i;t]
```

Where

-   `i` is a **positive integer**
-   `t` is a **simple table**, or a handle to one

returns `t` with the first `i` columns as key
```q
q)t:([]a:1 2 3;b:10 20 30;c:`x`y`z)
q)2!t
a b | c
----| -
1 10| x
2 20| y
3 30| z
```


## `!` Unkey

_Remove the key/s from a table._
```syntax
0!t    ![0;t]
```

Where `t` is a **keyed table**, or a handle to one, returns `t` as a simple table, with no keys.
```q
q)t:([a:1 2 3]b:10 20 30;c:`x`y`z)
q)0!t
a b  c
------
1 10 x
2 20 y
3 30 z
```


## Amending in place

For both Enkey and Unkey, if `t` is a table-name, `!` amends the table and returns the name.
```q
q)t:([a:1 2 3]b:10 20 30;c:`x`y`z)
q)0!`t
`t
q)t
a b  c
------
1 10 x
2 20 y
```

----

[`key`](key.md)


[`keys`](keys.md),
[`xkey`](keys.md#xkey)


[`!` bang](overloads.md#bang) overloads


[Tables](../kb/faq.md)