sc_begin_trans - This macro starts a set of transactions in the database.

sc_commit_trans - Makes all data modifications performed since the beginning of the transaction a permanent part of the database.

sc_exec_sql - This macro execute SQL commands passed as parameter or a SQL command in the SQL field action type.

sc_lookup - This macro executes a SELECT command stored in the second parameter and returns the data in a variable.

sc_lookup_field - This macro executes a SELECT command stored in the second parameter and returns the data in a variable.