SQL查询以从每一列获取数据

Question

I have multiple columns in a table

One column may contain the name of the state (US), another column contains the speciality

Here is some sample data (there could be more than one C# in NY and may also exist in other states)

C# NY
C# NJ
C# WA
C# CA
C# NY
C# NY
Java NY
Java NJ
Java IL

Basically I want to get an output that has

C# 100 (sum of all states that have C#)
Java 85 (sum of all states that have Java)

and I would like to get

State  Total Speciality
NY     150   C# 
NY     100   C++ 

I am using SQLite3 as my DB

Answer 1

SqlLite should have GROUP BY and COUNT. You may try:

SELECT Speciality, COUNT(State) AS Total
FROM YourTable 
GROUP BY Speciality 

and

SELECT State, Speciality, COUNT(*)  AS Total
FROM YourTable 
GROUP BY State, Speciality