# QueryAddColumn

Adds a column to a query and populates its rows with the contents of a one-dimensional array.

## Method Signature

```
QueryAddColumn(query=[query], columnName=[string], datatype=[any], array=[array])
```

### Arguments

| Argument     | Type     | Required | Description                                                                                                 | Default  |
| ------------ | -------- | -------- | ----------------------------------------------------------------------------------------------------------- | -------- |
| `query`      | `query`  | `true`   | The query object to which the column should be added.                                                       |          |
| `columnName` | `string` | `true`   | The name of the column to add.                                                                              |          |
| `datatype`   | `any`    | `false`  | The column data type of the new column or the array to populate the column with a generic type of anything. | `object` |
| `array`      | `array`  | `false`  |                                                                                                             | `[]`     |

## Examples

### Tag Example

```java
<!--- Make a query. ---> 
 <bx:set myQuery = queryNew( "" ) > 
  <!--- Create an array. ---> 
 <bx:set FastFoodArray = arrayNew( 1 ) > 
 <bx:set FastFoodArray[ 1 ] = "French Fries" > 
 <bx:set FastFoodArray[ 2 ] = "Hot Dogs" > 
 <bx:set FastFoodArray[ 3 ] = "Fried Clams" > 
 <bx:set FastFoodArray[ 4 ] = "Thick Shakes" > 
 <!--- Use the array to add a column to the query. ---> 
 <bx:set nColumnNumber = queryAddColumn( myQuery, "FastFood", "VarChar", FastFoodArray ) > 
 <bx:dump var="#myQuery#"/> 
```

### member syntax example

add a column to a query using member syntax

[Run Example](https://try.boxlang.io/?code=eJxLys%2FPLlawVSgsTS2q9Est11BQykzRKcksyUlV0gGy80pS01OLdMoSi5IzEouUFDStuZJAWvQSU1Kc83NKc%2FOAOhJLSzLyi0DqYep0FKJjQWrLizJLUl1Kcws0FMDaQGIAukUlgg%3D%3D)

```java
books = queryNew( "id,title", "integer,varchar" );
books.addColumn( "author", "varchar", [] );
writeDump( books );

```

### Additional Examples

[Run Example](https://try.boxlang.io/?code=eJwrLKpUsFUoLE0tqvRLLddQUEpMTNRJSkpSUtC05goECTumpATlA2UKgSphYsGpJc6pOTlgQR2wHiUgZahnqIRLCchIsBIjckw2ImyyEZrJzvk5pbl5MEXJyclARTmZxSUh%2BY5FRYmVQJ8a6xnqGIN14daXkpICMjwzryQ1PbUIwwgToBEmcCPKizJLUl1KcwvAuvWc%2FX1Cff18PINDQJIAVuJqfw%3D%3D)

```java
qry = queryNew( "aaa,bbb" );
QueryAddRow( qry );
QuerySetCell( qry, "aaa", "1.1" );
QuerySetCell( qry, "bbb", "1.2" );
QueryAddRow( qry );
QuerySetCell( qry, "aaa", "2.1" );
QuerySetCell( qry, "bbb", "2.2" );
QueryAddColumn( qry, "ccc", listToArray( "3.1,3.2" ) );
QueryAddColumn( qry, "ddd", "integer", listToArray( "4.1,4.2" ) );
writeDump( qry.COLUMNLIST );

```

## Related

* [QueryAddRow](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/queryaddrow)
* [QueryAppend](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/queryappend)
* [QueryClear](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/queryclear)
* [QueryColumnArray](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querycolumnarray)
* [QueryColumnCount](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querycolumncount)
* [QueryColumnData](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querycolumndata)
* [QueryColumnExists](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querycolumnexists)
* [QueryColumnList](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querycolumnlist)
* [QueryCurrentRow](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querycurrentrow)
* [QueryDeleteColumn](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querydeletecolumn)
* [QueryDeleteRow](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querydeleterow)
* [QueryEach](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/queryeach)
* [QueryEvery](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/queryevery)
* [QueryFilter](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/queryfilter)
* [QueryGetCell](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querygetcell)
* [QueryGetResult](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querygetresult)
* [QueryInsertAt](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/queryinsertat)
* [QueryKeyExists](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querykeyexists)
* [QueryMap](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querymap)
* [QueryNew](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querynew)
* [QueryNone](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querynone)
* [QueryPrepend](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/queryprepend)
* [QueryRecordCount](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/queryrecordcount)
* [QueryRecordCount](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/queryrecordcount)
* [QueryReduce](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/queryreduce)
* [QueryRegisterFunction](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/queryregisterfunction)
* [QueryReverse](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/queryreverse)
* [QueryRowData](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/queryrowdata)
* [QueryRowSwap](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/queryrowswap)
* [QuerySetCell](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querysetcell)
* [QuerySetRow](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querysetrow)
* [QuerySlice](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/queryslice)
* [QuerySome](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querysome)
* [QuerySort](https://boxlang.ortusbooks.com/boxlang-language/reference/built-in-functions/query/querysort)


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