Some examples of tcl and sqlite usage:
NOTE: the name of the database is opendb
* Retrieve the names of the tables stored in a sqlite database:
set tableNames opendb eval {SELECT tbl_name FROM sqlite_master}
* Retrieve the names of the columns (variable columnName):
opendb eval "SELECT * FROM nuno LIMIT 1" x {set columnName $x(*)}
* Retrieve the row data from a table