revDatabaseColumnNamed

returns data from a specified database field in a database.

# Metadata

Platforms: desktop, server, mobile OS: mac, windows, linux, ios, android Introduced: 1.1 Security: disk, network

# Syntax

revDatabaseColumnNamed(recordSetID, columnName [, holderVariable])

# Params

- recordSetID : The number returned by the revQueryDatabase function when the record set was created. - columnName : The name of a database field. - holderVariable : A valid variable name or the name of an array element.

# Examples

revDatabaseColumnNamed(myResults,"LASTNAME")

revDatabaseColumnNamed(zipSearch,"CARRIER","foundCarriers")

revDatabaseColumnNamed(tCursor, "id", "tRetrievedDataArray[id]")

# Description

Use the revDatabaseColumnNamed function to obtain the contents of a given database field, in the current record of the specified record set .

If you specify a holderVariable, the data is placed in that variable. Otherwise, the data is return by the function. To retrieve binary data from the database, a holder variable must be specified, otherwise the revDatabaseColumnNamed function may return truncated data. This is due to limitations in the current architecture.

If the attempt to get the data is not successful, the revDatabaseColumnNamed function returns an error message that begins with the string "revdberr".

>*Important:* The revDatabaseColumnNamed function is part of the > Database library. To ensure that the function works in a > standalone application, you must include this > LiveCode custom library when you create your > standalone application. In the Inclusions pane of the > Standalone Application Settings window, make sure both the > "Database" library checkbox and those of the database drivers you are > using are checked.

>*Important:* The name of the holderVariable must be a quoted string. > If the holderVariable is in an array, the key must either not be > a variable itself or separated from the quoted parts. For example, > if the `i` in `tArray[i]` were itself a variable, holderVariable > would have to be written as:

"tArray[" & i & "]"

# Tags

database,

# See

- **keyword:** string - **control structure:** function - **function:** revDatabaseColumnNames, revDatabaseColumnLengths, revDatabaseColumnNumbered - **library:** Database library - **glossary:** LiveCode custom library, return, variable, database, record set, record, Standalone Application Settings, standalone application, database field