miniDBMS

A miniDBMS that support some SQL comment:

for example:

1. CREATE TABLE table1 (
   attribute1 int PRIMARY KEY,
   attribute2 varchar(20),
   attribute3 varchar(40),
   attribute4 int
   );
   
   
2. INSERT INTO table1 (attribute1, attribute2, attribute3) VALUES (0, 'abcd', '123456789', 1);
      or INSERT INTO table1 VALUES (0, 'abcd', '123456789, 1);
   
   
3. SELECT query including join operation
      ex. SELECT *
   FROM table1, table2
   WHERE atattribute4 < 5 AND table1.atattribute1 = table2.atattribute4;
   and also support COUNT, SUM operation.
   
   
4. Applying index to certain attribute:
   ex. CREATE INDEX indexname on table1 (attribute1) using hashing;
   or CREATE INDEX indexname on table1 (attribute1) using btree;