檢索數據這是我的兩個表如何從兩個表
CREATE TABLE `futstkrprices` (
`name` varchar(50) DEFAULT NULL,
`expiry_date` varchar(25) DEFAULT NULL,
`contract_type` varchar(50) DEFAULT NULL,
`close_price` decimal(15,2) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
CREATE TABLE `historical_data` (
`symbol_name` varchar(70) DEFAULT NULL,
`open_val` decimal(15,2) DEFAULT NULL,
`high_val` decimal(15,2) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO futstkrprices (name,expiry_date,contract_type,close_price)
values ('ABIRLANUVO' ,'26-MAY-2016','FUTSTK',870.65);
INSERT INTO futstkrprices (name,expiry_date,contract_type,close_price)
values ('ABIRLANUVO' ,'28-APR-2016','FUTSTK',866.40);
INSERT INTO futstkrprices (name,expiry_date,contract_type,close_price)
values ('ABIRLANUVO' ,'30-JUN-2016','FUTSTK',875.95);
INSERT INTO historical_data (symbol_name,open_val,high_val) values ('ABIRLANUVO',872.00,878.25)
這裏的數據庫結構樣品小提琴
http://sqlfiddle.com/#!9/1d4f20
你能告訴我怎樣才能檢索數據從這兩個表 我已經嘗試過,但它不工作
select futstkrprices.name , futstkrprices.expiry_date , futstkrprices.close_price , historical_data.symbol_name ,
historical_data.open_val , historical_data.high_val from futstkrprices LEFT JOIN futstkrprices
ON futstkrprices.name=historical_data.symbol_name;
所需的輸出我期待是
name expiry_date close_price symbol_name open_val high_val
ABIRLANUVO 26-MAY-2016 870.65 ABIRLANUVO 872 878.25
ABIRLANUVO 28-APR-2016 866.4 ABIRLANUVO 872 878.25
ABIRLANUVO 30-JUN-2016 875.95 ABIRLANUVO 872 878.25
感謝您創建sqlfiddle設置!你可以請發佈所需的輸出? – Quassnoi