Iterates over sql files, imports them into a dummy db, gets information about table structure, prints out 3 sample rows, drops the table.

get_sql_file_contents_and_sample_data.sh

#!/bin/bash

for DB_FILE in $(ls *.sql); do
echo "Using $DB_FILE"
head -c $(expr length "Using $DB_FILE") < /dev/zero | tr '\0' '='
echo
mysql erictest2 < $DB_FILE
mysql erictest2 --batch --silent -e 'show tables' | xargs -I tbl bash -c "echo Table structure for \'tbl\' && mysql erictest2 -t -e 'desc tbl' && mysql erictest2 -t -e 'select * from tbl limit 3\G; drop table tbl;'"
echo
done > out.txt