Mysql檢視表結構資訊

檢視所有的庫

select lower(schema_name) schema_name
from information_schema.schemata
where schema_name not in (
'mysql',
'information_schema',
'test',
'search',
'tbsearch',
'sbtest',
'dev_ddl'
)檢視某乙個庫中的所有表
select table_name,
create_time updated_at,
table_type,
engine,
table_rows num_rows,
table_comment,
ceil(data_length / 1024 / 1024) store_capacity
from information_schema.tables
where table_schema = 'employees'
and table_name not like 'tmp#_%' escape '#'
檢視某乙個庫下某乙個表的所有字段
select lower(column_name) column_name,
ordinal_position position,
column_default ****ult_value,
substring(is_nullable, 1, 1) nullable,
column_type data_type,
column_comment,
character_maximum_length data_length,
numeric_precision data_precision,
numeric_scale data_scale
from information_schema.columns
where table_schema = 'employees'
and table_name = 'employees';
檢視某乙個庫下某一張表的索引
select distinct
lower(index_name) index_name,
lower(index_type) type
from information_schema.statistics
where table_schema = 'employees'
and table_name = 'employees';
檢視某乙個庫下某一張表的某乙個索引
select lower(column_name) column_name,
seq_in_index column_position
from information_schema.statistics
where table_schema = 'employees'
and table_name = 'employees'
and index_name = 'primary';
檢視某乙個庫下某乙個表的注釋
select table_comment comments
from information_schema.tables
where table_schema = 'employees'
and table_name = 'tablename';
檢視某乙個庫下某乙個表的列的注釋
select lower(column_name) column_name,  
column_comment comments  
from information_schema.columns
where table_schema ='databasename'
and table_name = 'tablename';

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