자주 쓰는 편인것;
13.7.5.5
SHOW COLUMNS SyntaxSHOW [FULL] COLUMNS {FROM | IN} tbl_name [{FROM | IN} db_name]
[LIKE 'pattern' | WHERE expr]
13.7.5.10
SHOW CREATE TABLE SyntaxSHOW CREATE TABLE tbl_name
13.7.5.38
SHOW VARIABLES SyntaxSHOW [GLOBAL | SESSION] VARIABLES
[LIKE 'pattern' | WHERE expr]
http://dev.mysql.com/doc/refman/5.7/en/show.html