Firebird SQL连接表

Question

Currently I have tables like these:

Table Customer

ID      Name
01      Angel
02      Charlie

Table Input1

Name     Value
Charlie  5
Angel    7
Charlie  10
Angel    3

Table Input2

Name     Value
Charlie  10
Angel    5
Charlie  15
Angel    25

How to get result like this

Name     Input1     Input2
Angel    10         30
Charlie  15         25

Answer 1

Try this:

SELECT 
    c.Name, 
    i1."Value" value1, 
    i2."Value" value2
FROM 
    Customer c LEFT JOIN 
    (SELECT Name, SUM("Value") "Value" from input1 group by Name) i1
    ON c.Name = i1.Name LEFT JOIN 
    (SELECT Name, SUM("Value") "Value" from input2 group by Name) i2
    ON c.Name = i2.Name

DEMO

http://sqlfiddle.com/#!9/204220/2