#数据库MySQL 6.7use sakila;
#查询表名
show tables;
#
SELECT TABLE_NAME,TABLE_ROWS FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA='sakila';select column_name from information_schema.columns where table_schema='sakila' and table_name='actor';
#表结构 字段名， 类型，长度
select * from information_schema.columns where table_schema='sakila' and table_name='actor';# GetTables
SELECT TABLE_NAME, '' OWNER, CREATE_TIME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = 'sakila' AND TABLE_TYPE = 'BASE TABLE' ORDER BY 1;
#GetTableColumns
SELECT COLUMN_NAME, DATA_TYPE, CHARACTER_OCTET_LENGTH, NUMERIC_PRECISION, NUMERIC_SCALE, CASE IS_NULLABLE WHEN 'NO' THEN 0 ELSE 1 END IS_NULLABLE, COLUMN_TYPE FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = 'sakila' AND TABLE_NAME = 'address' ORDER BY ORDINAL_POSITION;
#GetViews
SELECT TABLE_NAME, '' OWNER, CREATE_TIME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = 'sakila' AND TABLE_TYPE = 'VIEW' ORDER BY 1;
#GetViewColumns
SELECT COLUMN_NAME, DATA_TYPE, CHARACTER_OCTET_LENGTH, NUMERIC_PRECISION, NUMERIC_SCALE, CASE IS_NULLABLE WHEN 'NO' THEN 0 ELSE 1 END IS_NULLABLE, COLUMN_TYPE FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = 'sakila' AND TABLE_NAME = 'actor_info' ORDER BY ORDINAL_POSITION;
#GetTablePrimaryKey
SELECT t1.CONSTRAINT_NAME, t1.COLUMN_NAME FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE t1 INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS t2 ON t2.TABLE_SCHEMA = t1.TABLE_SCHEMA  AND t2.TABLE_NAME = t1.TABLE_NAME AND t2.CONSTRAINT_NAME = t1.CONSTRAINT_NAME WHERE t1.TABLE_SCHEMA = 'sakila' AND t1.TABLE_NAME = 'address' AND t2.CONSTRAINT_TYPE = 'PRIMARY KEY' ORDER BY t1.ORDINAL_POSITION;
#GetTableIndexes
SELECT INDEX_NAME, COUNT(*) AS COLUMN_COUNT, MAX(NON_UNIQUE) NON_UNIQUE,  CASE INDEX_NAME WHEN 'PRIMARY' THEN 1 ELSE 0 END IS_PRIMARY
FROM INFORMATION_SCHEMA.STATISTICS
WHERE  TABLE_SCHEMA = 'sakila' AND TABLE_NAME = 'customer'
GROUP BY INDEX_NAME
ORDER BY INDEX_NAME;SELECT INDEX_NAME, COLUMN_NAME
FROM INFORMATION_SCHEMA.STATISTICS
WHERE  TABLE_SCHEMA = 'sakila' AND TABLE_NAME = 'customer'
ORDER BY INDEX_NAME, SEQ_IN_INDEX;
#GetMyTableKeys
SELECT CONSTRAINT_NAMEFROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS t1WHERE t1.TABLE_SCHEMA = 'sakila' AND t1.TABLE_NAME = 'customer'AND CONSTRAINT_TYPE = 'FOREIGN KEY';SELECT t1.CONSTRAINT_NAME, t1.COLUMN_NAME, t1.POSITION_IN_UNIQUE_CONSTRAINT,t1.REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAMEFROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE t1INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS t2ON t2.TABLE_SCHEMA = t1.TABLE_SCHEMAAND t2.TABLE_NAME = t1.TABLE_NAMEAND t2.CONSTRAINT_NAME = t1.CONSTRAINT_NAMEWHERE t1.TABLE_SCHEMA = 'sakila' AND t1.TABLE_NAME = 'customer'AND t2.CONSTRAINT_TYPE = 'FOREIGN KEY'ORDER BY t1.CONSTRAINT_NAME, t1.POSITION_IN_UNIQUE_CONSTRAINT;#GetOthersTableKeys
SELECT DISTINCT CONSTRAINT_NAMEFROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE t1WHERE t1.TABLE_SCHEMA = 'sakila' AND t1.REFERENCED_TABLE_NAME = 'customer';SELECT t1.CONSTRAINT_NAME, t1.TABLE_NAME, t1.COLUMN_NAME, t1.POSITION_IN_UNIQUE_CONSTRAINT, t1.REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAMEFROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE t1INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS t2ON t2.TABLE_SCHEMA = t1.TABLE_SCHEMAAND t2.TABLE_NAME = t1.TABLE_NAMEAND t2.CONSTRAINT_NAME = t1.CONSTRAINT_NAMEWHERE t1.TABLE_SCHEMA = 'sakila' AND t1.REFERENCED_TABLE_NAME = 'customer'AND t2.CONSTRAINT_TYPE = 'FOREIGN KEY'ORDER BY t1.CONSTRAINT_NAME, t1.POSITION_IN_UNIQUE_CONSTRAINT;
#GetViewText
SELECT VIEW_DEFINITION FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_SCHEMA = 'sakila' AND TABLE_NAME = 'actor_info';
# GetCommands
SELECT ROUTINE_NAME, '' OWNER, CREATED FROM INFORMATION_SCHEMA.ROUTINES WHERE ROUTINE_SCHEMA = 'sakila' AND ROUTINE_TYPE = 'PROCEDURE' ORDER BY 1;
#GetCommandParameters
#GetCommandText
SELECT ROUTINE_DEFINITION FROM INFORMATION_SCHEMA.ROUTINES WHERE ROUTINE_SCHEMA = 'sakila' AND ROUTINE_NAME = 'film_in_stock' #存储过程