mysql匯出資料字典彙總

2021-10-24 17:56:52 字數 1843 閱讀 7368

select

table_catalog,

table_schema as 資料庫名,

table_name as 表名,

column_name as 欄位名,

ordinal_position as 字段位置,

column_default as 字段預設值,

is_nullable 是否允許空值,

data_type as 資料型別,

character_maximum_length as 以字元為單位的最大長度,

character_octet_length as 以位元組為單位的最大長度,

numeric_precision as 數值型別的長度,

numeric_scale as 小數點精度,

datetime_precision as 回的日期時間值的精度,

character_set_name as 編碼方式,

collation_name as 校對集,

column_type as 字段型別,

column_key as 鍵,

extra as 額外的資訊例如自動遞增在這裡顯示,

privileges as 許可權,

column_comment as 字段注釋,

generation_expression

from

information_schema. columns

where

table_schema = '***'

select

b.`表注釋`,

information_schema.columns.table_name as '表名',

information_schema.`columns`.column_name as '欄位名',

information_schema.`columns`.column_type as '資料型別',

information_schema.`columns`.column_default as 字段預設值,

information_schema.`columns`.character_maximum_length as 以字元為單位的最大長度,

information_schema.`columns`.character_octet_length as 以位元組為單位的最大長度,

information_schema.`columns`.numeric_precision as 數值型別的長度,

information_schema.`columns`.numeric_scale as 小數點位數,

information_schema.`columns`.is_nullable as '允許為空',

information_schema.`columns`.column_comment as '字段說明'

from

information_schema.`columns` left join

(select

information_schema.tables.table_comment as '表注釋',

information_schema.tables.table_name as '表名'

from

information_schema.tables

where

table_schema = 'sub_test') b

on information_schema.columns.table_name = b.`表名`

where

table_schema = 'sub_test'

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