dbQueryFetchOneM¶

Purpose¶

Returns a single row as an Nx1 matrix where N is the column count of the SELECT statement containing the field information for the current query.

Format¶

record = dbQueryFetchOneM(qid[, columns])¶

Parameters:

qid (scalar) – query number.
columns (string or string array) – Optional input. Gives specific columns to pull from the result matrix. Must be a subset of fields from the SELECT statement.

Returns:

record (matrix) – if the query points to a valid row (dbQueryIsValid() returns true), the record is populated with the row’s values. An empty record (scalmiss(record) is true) is returned when there is no active query (dbQueryIsActive() returns false).

Examples¶

// Execute `qid` query
qid = dbExecQuery(db_id, "SELECT YTD,
     TOTAL FROM GDP");

/*
** Iteratively retrieve single records
** and store as matrix
*/
do while dbQuerySeekNext(qid);
   record = dbQueryFetchOneM(qid);
   ytd = record[1];
   total = record[2];
endo;

Remarks¶

This function is only useful in an iterative context. You can easily retrieve all the results at once by using the dbQueryFetchAllM() and dbQueryFetchAllSA() functions.

For string results, or to treat numerical results as a string, using dbQueryFetchOneSA() will return a string array.