MySQL and Sql Server:Getting metadata using sql script (SQL-92 standard)
2017-07-05 10:08
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MySQL:
sql server :
SQL Server Metadata Toolkit 2005 - 2014 https://sqlmetadata.codeplex.com/
https://www.nuget.org/packages/Microsoft.Msagl/ http://www.microsoft.com/en-us/download/details.aspx?id=52034
MySQL 表的注释(备注)信息
ALTER DATABASE testdb SET RECOVERY FULL;
BACKUP DATABASE testdb TO DISK='c:temp\testdb.bak' WITH INIT;
use sakila; -- show fields from table_name; -- show keys from table_name; SELECT `REFERENCED_TABLE_NAME` FROM `information_schema`.`KEY_COLUMN_USAGE` WHERE `TABLE_NAME` = '[table_containing_foreign_key]' AND `COLUMN_NAME` = '[foreign_key]'; SHOW COLUMNS FROM City; select * from information_schema.tables; select * from information_schema.tables where table_schema='sakila'; select * from information_schema.tables; select * from information_schema.KEY_COLUMN_USAGE; select * from information_schema.PARAMETERS; select * from information_schema.VIEWS; select * from information_schema.TRIGGERS; -- get Table/Fields metadata SELECT table_schema, table_name, column_name, ordinal_position, data_type, numeric_precision, column_type, column_default, is_nullable, column_comment FROM information_schema.columns -- WHERE (table_schema='sakila' and table_name = 'city') -- 显示指定表 WHERE table_schema='sakila' order by ordinal_position; -- get Foregn Keys referenced table SELECT `REFERENCED_TABLE_NAME` FROM `information_schema`.`KEY_COLUMN_USAGE` WHERE `TABLE_NAME` = 'city'; -- `TABLE_NAME` = 'table_name' AND -- `COLUMN_NAME` = 'Column_Name' -- get indexes (primary and foreign) for a table -- get All indexes and referreced table SELECT * FROM `information_schema`.`KEY_COLUMN_USAGE` WHERE `TABLE_NAME` = 'city' AND `TABLE_SCHEMA` = 'sakila'; SELECT * FROM `information_schema`.`REFERENTIAL_CONSTRAINTS` WHERE `TABLE_NAME` = 'city' AND `CONSTRAINT_SCHEMA` = 'sakila'; -- get STORED PROCEDURES SELECT * FROM `information_schema`.`ROUTINES` WHERE `ROUTINE_SCHEMA` = 'sakila'; -- get TRIGGERS SELECT * FROM `information_schema`.`TRIGGERS` WHERE `TRIGGER_SCHEMA` = 'sakila'; -- get EVENTS SELECT * FROM `information_schema`.`EVENTS` WHERE `EVENT_SCHEMA` = 'sakila'; -- get VIEWS SELECT * FROM `information_schema`.`VIEWS` WHERE `TABLE_NAME` = 'city' AND `TABLE_SCHEMA` = 'sakila'; -- 'COLUMNS' 'EVENTS' 'FILES' 'TABLES' SELECT table_schema, table_name, column_name, ordinal_position, data_type, numeric_precision, column_type FROM information_schema.columns WHERE table_name = 'TABLES';
sql server :
--SQL-92 standard select TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME, COLUMN_NAME, DATA_TYPE, CHARACTER_MAXIMUM_LENGTH from DuVehicle.information_schema.columns; SELECT * FROM DuVehicle.INFORMATION_SCHEMA.PARAMETERS; GO GO /*INFORMATION_SCHEMA views: View Name Description CHECK_CONSTRAINTS Holds information about constraints in the database COLUMN_DOMAIN_USAGE Identifies which columns in which tables are user-defined datatypes COLUMN_PRIVILEGES Has one row for each column level permission granted to or by the current user COLUMNS Lists one row for each column in each table or view in the database CONSTRAINT_COLUMN_USAGE Lists one row for each column that has a constraint defined on it CONSTRAINT_TABLE_USAGE Lists one row for each table that has a constraint defined on it DOMAIN_CONSTRAINTS Lists the user-defined datatypes that have rules bound to them DOMAINS Lists the user-defined datatypes KEY_COLUMN_USAGE Lists one row for each column that's defined as a key PARAMETERS Lists one row for each parameter in a stored procedure or user-defined function REFERENTIAL_CONSTRAINTS Lists one row for each foreign constraint ROUTINES Lists one row for each stored procedure or user-defined function ROUTINE_COLUMNS Contains one row for each column returned by any table-valued functions SCHEMATA Contains one row for each database TABLE_CONSTRAINTS Lists one row for each constraint defined in the current database TABLE_PRIVILEGES Has one row for each table level permission granted to or by the current user TABLES Lists one row for each table or view in the current database VIEW_COLUMN_USAGE Lists one row for each column in a view including the base table of the column where possible VIEW_TABLE_USAGE Lists one row for each table used in a view VIEWS Lists one row for each view */
SQL Server Metadata Toolkit 2005 - 2014 https://sqlmetadata.codeplex.com/
Automatic Graph Layout
https://github.com/Microsoft/automatic-graph-layouthttps://www.nuget.org/packages/Microsoft.Msagl/ http://www.microsoft.com/en-us/download/details.aspx?id=52034
MySQL 表的注释(备注)信息
-- 创建带解释的表 CREATE TABLE groups( gid INT PRIMARY KEY AUTO_INCREMENT COMMENT '设置主键自增ID', gname VARCHAR(200) COMMENT '名称' ) COMMENT='群表'; SHOW CREATE TABLE city; #查看表的注释 SELECT table_name,table_comment FROM information_schema.tables WHERE table_schema = 'sakila' AND table_name ='groups'; # 查看列的注释 涂聚文 Geovin Du SHOW FULL COLUMNS FROM city; SELECT column_name, column_comment FROM information_schema.columns WHERE table_schema ='sakila' AND table_name = 'groups'; -- 表注释,列注释city_id use sakila; -- 表描述 ALTER TABLE city COMMENT='城市表'; -- 更改注释 alter table city modify column city varchar(50) comment '城市名称'; ALTER TABLE city MODIFY COLUMN `city_id` smallint(10) unsigned NOT NULL AUTO_INCREMENT COMMENT '城市ID'; ALTER TABLE city MODIFY COLUMN `country_id` smallint(5) unsigned NOT NULL COMMENT '国家代码'; ALTER TABLE city MODIFY COLUMN city_id smallint(10) unsigned NOT NULL AUTO_INCREMENT COMMENT '城市ID'; ALTER TABLE city MODIFY COLUMN country_id smallint(5) unsigned NOT NULL COMMENT '国家代码'; alter table city modify column last_update timestamp comment '更新时间'; SHOW CREATE TABLE city; #查看表的注释 SELECT table_name as '表名',table_comment as '表注释' FROM information_schema.tables WHERE table_schema = 'sakila' AND table_name ='city'; # 查看列的注释 SHOW FULL COLUMNS FROM city; SELECT column_name as '列名', column_comment as '列注释' FROM information_schema.columns WHERE table_schema ='sakila' AND table_name = 'city'; SELECT * FROM information_schema.columns WHERE table_schema ='sakila' AND table_name = 'city';
-- 数据库中所有表的主键和外键约束信息的Sql语句 -- 1方法 SELECT C.TABLE_SCHEMA, -- 拥有者, C.REFERENCED_TABLE_NAME, -- 父表名称 , C.REFERENCED_COLUMN_NAME, -- 父表字段 , C.TABLE_NAME, -- 子表名称, C.COLUMN_NAME, -- 子表字段, C.CONSTRAINT_NAME, -- 约束名, T.TABLE_COMMENT, -- 表注释, R.UPDATE_RULE, -- 约束更新规则, R.DELETE_RULE -- 约束删除规则 FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE C JOIN INFORMATION_SCHEMA. TABLES T ON T.TABLE_NAME = C.TABLE_NAME JOIN INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS R ON R.TABLE_NAME = C.TABLE_NAME AND R.CONSTRAINT_NAME = C.CONSTRAINT_NAME AND R.REFERENCED_TABLE_NAME = C.REFERENCED_TABLE_NAME WHERE C.REFERENCED_TABLE_NAME IS NOT NULL ; SELECT C.TABLE_SCHEMA 拥有者, C.REFERENCED_TABLE_NAME 父表名称 , C.REFERENCED_COLUMN_NAME 父表字段 , C.TABLE_NAME 子表名称, C.COLUMN_NAME 子表字段, C.CONSTRAINT_NAME 约束名, T.TABLE_COMMENT 表注释, R.UPDATE_RULE 约束更新规则, R.DELETE_RULE 约束删除规则 FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE C JOIN INFORMATION_SCHEMA. TABLES T ON T.TABLE_NAME = C.TABLE_NAME JOIN INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS R ON R.TABLE_NAME = C.TABLE_NAME AND R.CONSTRAINT_NAME = C.CONSTRAINT_NAME AND R.REFERENCED_TABLE_NAME = C.REFERENCED_TABLE_NAME WHERE C.REFERENCED_TABLE_NAME IS NOT NULL ; -- 2方法 select O.CONSTRAINT_SCHEMA,O.CONSTRAINT_NAME,O.TABLE_SCHEMA,O.TABLE_NAME,O.COLUMN_NAME,O.REFERENCED_TABLE_SCHEMA,O.REFERENCED_TABLE_NAME,O.REFERENCED_COLUMN_NAME,O.UPDATE_RULE,O.DELETE_RULE,O.UNIQUE_CONSTRAINT_NAME,T.CONSTRAINT_TYPE from ( select K.CONSTRAINT_SCHEMA,K.CONSTRAINT_NAME,K.TABLE_SCHEMA,K.TABLE_NAME,K.COLUMN_NAME,K.REFERENCED_TABLE_SCHEMA,K.REFERENCED_TABLE_NAME,K.REFERENCED_COLUMN_NAME,R.UPDATE_RULE,R.DELETE_RULE,R.UNIQUE_CONSTRAINT_NAME from information_schema.KEY_COLUMN_USAGE K LEFT join information_schema.REFERENTIAL_CONSTRAINTS R on K.CONSTRAINT_NAME=R.CONSTRAINT_NAME) as O inner join Information_schema.TABLE_CONSTRAINTS T on O.Table_Name=T.TABLE_NAME and T.CONSTRAINT_NAME=O.CONSTRAINT_NAME where O.CONSTRAINT_SCHEMA!='mysql' and O.CONSTRAINT_SCHEMA!='sys';
#查询数据库中所有表的自增主键: SELECT t.TABLE_NAME, c.COLUMN_NAME, ts.AUTO_INCREMENT FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS AS t, information_schema.TABLES AS ts, information_schema.KEY_COLUMN_USAGE AS c WHERE t.TABLE_NAME = ts.TABLE_NAME AND ts.TABLE_NAME = c.TABLE_NAME -- AND t.TABLE_SCHEMA = 数据库名称 AND t.CONSTRAINT_TYPE = 'PRIMARY KEY' ORDER BY ts.`AUTO_INCREMENT` DESC; # 查询数据库中所有表的主键及数量: SELECT t.TABLE_NAME, t.CONSTRAINT_TYPE, c.COLUMN_NAME, c.ORDINAL_POSITION FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS AS t, INFORMATION_SCHEMA.KEY_COLUMN_USAGE AS c, information_schema.TABLES AS ts WHERE t.TABLE_NAME = c.TABLE_NAME AND t.TABLE_SCHEMA = 'sakila' AND t.CONSTRAINT_TYPE = 'PRIMARY KEY'; # 查看所有没有主键的表 SELECT #CONCAT("truncate table ",table_name,";") table_name FROM information_schema. TABLES WHERE table_schema = 'sakila' AND TABLE_NAME NOT IN ( SELECT table_name FROM information_schema.table_constraints t JOIN information_schema.key_column_usage k USING ( constraint_name, table_schema, table_name ) WHERE t.constraint_type = 'PRIMARY KEY' AND t.table_schema = 'sakila' ); -- SELECT column_name FROM INFORMATION_SCHEMA.`KEY_COLUMN_USAGE` WHERE table_name='city' AND constraint_name='PRIMARY' AND CONSTRAINT_SCHEMA='sakila'; show keys from `city` where key_name='PRIMARY'; select DISTINCT COLUMN_NAME from INFORMATION_SCHEMA.COLUMNS where table_name='city' AND COLUMN_KEY='PRI'; SELECT t.TABLE_NAME, t.CONSTRAINT_TYPE, c.COLUMN_NAME, c.ORDINAL_POSITION FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS AS t, INFORMATION_SCHEMA.KEY_COLUMN_USAGE AS c WHERE t.TABLE_NAME = c.TABLE_NAME AND t.TABLE_SCHEMA = 'sakila' AND t.CONSTRAINT_TYPE = 'PRIMARY KEY';
ALTER DATABASE testdb SET RECOVERY FULL;
BACKUP DATABASE testdb TO DISK='c:temp\testdb.bak' WITH INIT;
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