Comparison are given below with include all the basic concept :-
| Category | Problem | Assessment | ||
|---|---|---|---|---|
| MySQL | Oracle8 | Postgres | ||
| Elementary features | Basic data types | B | C | A |
| SQL | C | B | B | |
| Declarative constraints | C | A | A | |
| Programming abstractions | D | A | C | |
| Generation of ids | C | A | A | |
| National chars | B | A | B | |
| Transactions | Transactions | D | A | A |
| Locks | D | A | A | |
| Multiuser access | C | A | C | |
| Programming in DB | ||||
