Mini​ sql engine which will run a subset of SQL Queries using ​ command line interface​.

1. Select all records :

	select * from table_name;

2. Aggregate functions: Simple aggregate functions on a single column. Sum, average, max and min. They will be very trivial given that the data is only numbers.

	Select MAX(col1) from table1;

3. Project Columns(could be any number of columns) from one or more tables :

	Select col1, col2 from table_name;

4. Select/project with distinct from one table : Select distinct(col1), distinct(col2) from table_name;

5. Select with where from one or more tables :

	Select col1,col2 from table1,table2 where col1 = 10 AND col2 = 20;

a. In the where queries, there would be a maximum of one AND/OR operator with no NOT operators.

6. Projection of one or more(including all the columns) from two tables with one join: condition :

> Select * from table1, table2 where table1.col1=table2.col2;
> Select col1,col2 from table1,table2 where table1.col1=table2.col2;

Repository also contains two phase merge sort which is used for sorting data more than the size of Main memory. Instruction for running the sort are provided in pdf inside sort's folder.