mysql查看表信息

SQL语句可以取得MySQL表信息、外键关系等重要信息，有着很好的使用价值，如果您在MySQL表信息方面遇到过类似的问题，不妨一看。
/取得表信息/
select table_Comment as Script, table_Name as TableName, 0 as id, Create_Time as createDate,
CASE table_Type WHEN 'BASE TABLE' then 'U' when 'VIEW' then 'V' ELSE table_Type END as tableType,
0 as Category from tables;

/取得外键关系/
SELECT CONSTRAINT_Name as Script, CONSTRAINT_Name as TableName, 0 as id,
CURRENT_TIMESTAMP as createDate,
CASE CONSTRAINT_TYPE
WHEN 'FOREIGN KEY' THEN 'F'
WHEN 'PRIMARY KEY' THEN 'K'
ELSE CONSTRAINT_TYPE
END AS tableType, 0 as Category From TABLE_CONSTRAINTS;

SELECT Table_Name, Column_Name, Column_Type, Column_Key, Column_Comment From Columns ;

/取得列信息/
select table_name as tablename, column_Name as columnName, column_type as columnType,
0 as columntypeindex, CHARACTER_OCTET_LENGTH as length, Numeric_Precision as decimaldigits,
column_comment as Script,column_default as defaultvalue, is_nullable as isnullable,
case extra when 'auto_increment' then 1 else 0 end as IsMarking,
0 as colid, 'U' as ObjectType, data_type from columns;