...
CR_COLS         -> CR_COL CR_COLS1
CR_COLS1        -> , CR_COLS
                 | ε
...
CONS            -> CONS1 CONS2
                 | ε
CONS2           -> , CONS
                 | ε
...
COL_NAMES       -> CR_COL_NAME COL_NAMES1
COL_NAMES1      -> , COL_NAMES
                 | ε
...
COLUMNS         -> COLUMN COLUMNS1
COLUMNS1        -> , COLUMNS
                 | ε
...
TABLES          -> TABLENAME ALIAS TABLES1
TABLES1         -> , TABLES
                 | ε
...