54. Demo usage How to describe a wide table? With sample data attached?
55. Columns $ echo 'select DATA_TYPE, CHARACTER_MAXIMUM_LENGTH from information_schema.columns where table_name=?'| emp employees | tee emp-desc ↵ DATA_TYPE CHARACTER_MAXIMUM_LENGTH int date varchar 14 varchar 16 enum 1 date
56. Demo Row $ echo 'select * from employees limit 1' | emp 2>&1 | row2col | tee emp-data ↵ emp_no 10001 birth_date 1953-09-02 first_name Georgi last_name Facello gender M hire_date 1986-06-26
57. And now? Run merge-tab over the two files $ merge-tab emp.data emp.desc ↵ emp_no 10001 int birth_date 1953-09-02 date first_name Georgi varchar 14 last_name Facello varchar 16 gender M enum 1 hire_date 1986-06-26 date