ReadV statement [Revelation On-Line Wiki]

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====== ReadV statement ======


 
==== Description ====
 
Reads a specific column into a BASIC+ variable.
 
==== Syntax ====
 
**ReadV** //variable// From //table_var//, //key//, //column// Then %%|%% Else //statements//
 
==== Parameters ====
 
The ReadV statement has the following parameters.

^Parameter^Description^
|//variable//|Assigned the value of the data from the specified column of the row specified by //key//.|
|//Table_var//|A table variable that has been previously specified in an Open statement.|
|//Key//|Contains the key to the column that is to be read.|
|//column//|The index number of the column that is to be read. The value of //column// must be greater than zero.|
|Then|The statements in the Then clause will be executed after a successful ReadV operation.|
|Else|The statement(s) following Else are executed if the column cannot be read. The Status() function indicates the severity of the error, and the system variable @FILE_ERROR contains detail about the nature of the error.|

 
==== See Also ====
 
[[matread|MatRead]], [[open|Open]], [[read|Read]], [[write|Write]], [[xlate|Xlate()]]
 
==== Example ====
 
<code>
/* Column 2 of rows 100 through 106 is read into cname, and returned to the caller. */

Open "CUSTOMERS" To CUSTOMER_TABLE Else
  status = Set_FSError()
  Return
End
For I = 100 To 106
  ReadV cname From CUSTOMER_TABLE, I, 2 Then
    /* process cname */
  End
Next I
End
</code>