mysql system built-in table

table_catalog

table_schema

mysql information_schema.tables;



table_name

table_type

engine

version

row_format

table_rows

avg_row_length

data_length

max_data_length

index_length

data_free

auto_increment

create_time

update_time

check_time

table_collation

checksum

create_option

table_comment







default schema has

information_schema

has 40 tables



mysql

has 24 tables



performance_schema

has 17 tables

total system default tables is 81;



user-defined database;