mysql sql summary query will display two result sets in one row

Recently, I am working on a statistical function, which includes statistics based on the different states of a field in a table. When outputting, multiple data of the same business are aggregated into one piece of data for display.

The database is MYSQL, directly on the code, the example is as follows:

 

Create table statement:

CREATE TABLE `TB_TABLE` (
  `ID` char(32) NOT NULL COMMENT '主键',
  `BIZ_NUM` varchar(30) DEFAULT NULL COMMENT 'Business Number',
  `BIZ_AMT` int(11) DEFAULT NULL COMMENT 'Amount',
  `TYPE` char(11) DEFAULT NULL COMMENT 'Type, 01-inflow; 02-outflow',
  PRIMARY KEY (`ID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='Information table';


INSERT INTO TB_TABLE VALUES('1','111',120,'01');
INSERT INTO TB_TABLE VALUES('2','111',80,'02');
INSERT INTO TB_TABLE VALUES('3','111',30,'01');
INSERT INTO TB_TABLE VALUES('4','222',70,'01');
INSERT INTO TB_TABLE VALUES('5','222',50,'02');

 

Expected output effect:

Business ID Inflow Amount Outflow Amount

111                    150            80

222                    70              50

 

method one:

select
t.biz_num,
sum(case when t.type='01' then t.biz_amt end) as bizAmtIn,
sum(case when t.type='02' then t.biz_amt end) as bizAmtOut
from tb_table t
where t.type in ('01','02')
group by t.biz_num

 Method Two:

select
t.biz_num,
sum(if(t.type='01',t.biz_amt,0)) as bizAmtIn,
sum(if(t.type='02',t.biz_amt,0)) as bizAmtOut
from tb_table t
where t.type in ('01','02')
group by t.biz_num;