Question

我在oracle中有这些数据集：

app_name  batch_group  session_total 
--------  ------------ -------------
app1      b1              5
app2      b1              10
app1      b2              80
app2      b2              99
app1      b3              20
app2      b3              59

我想在oracle

中提供这些格式的数据

app_name  session1  session2 session3
--------  --------  -------- --------
app1      5          80       20
app2      10         99       59

会话将根据批量增加。如果得到6批将在会议6之前出来。请帮助我，因为我在sql中新建了

Answer 1

SQL Fiddle

Oracle 11g R2架构设置：

CREATE TABLE TEST ( app_name,  batch_group,  session_total ) AS
          SELECT 'app1', 'b1',  5 FROM DUAL
UNION ALL SELECT 'app2', 'b1', 10 FROM DUAL
UNION ALL SELECT 'app1', 'b2', 80 FROM DUAL
UNION ALL SELECT 'app2', 'b2', 99 FROM DUAL
UNION ALL SELECT 'app1', 'b3', 20 FROM DUAL
UNION ALL SELECT 'app2', 'b3', 59 FROM DUAL;

查询1 ：

SELECT app_name,
       SUM( CASE batch_group WHEN 'b1' THEN session_total END ) AS session1,
       SUM( CASE batch_group WHEN 'b2' THEN session_total END ) AS session2,
       SUM( CASE batch_group WHEN 'b3' THEN session_total END ) AS session3
FROM   TEST
GROUP BY app_name

<强> Results ：

| APP_NAME | SESSION1 | SESSION2 | SESSION3 |
|----------|----------|----------|----------|
|     app1 |        5 |       80 |       20 |
|     app2 |       10 |       99 |       59 |

查询2 ：

SELECT * FROM
(
  SELECT *
  FROM   TEST
)
PIVOT 
(
  SUM( session_total)
  FOR batch_group
  IN (
    'b1' AS session1,
    'b2' AS session2,
    'b3' AS session3
  )
)

<强> Results ：

| APP_NAME | SESSION1 | SESSION2 | SESSION3 |
|----------|----------|----------|----------|
|     app1 |        5 |       80 |       20 |
|     app2 |       10 |       99 |       59 |

sql以单行输出多个数据

1 个答案: