You can create a column index explicitly using either of two tools.
Interactive SQL
To create a Sybase IQ column index, use the SQL syntax in Reference: Statements and Options > SQL Statements > CREATE INDEX statement.
To create a Sybase IQ column index, use the SQL syntax in Reference: Statements and Options > SQL Statements > CREATE INDEX statement.
Sybase Central
To create a column index using Sybase Central, see “Creating Column Indexes” in Introduction to Sybase IQ > Indexing and Loading Data.