Apples and Oranges, Part II: A Linux DBMS Comparison - page 4
The Database Design
As mSQL is a scaled-down database manager (indeed, some may question whether MySQL and mSQL are database-management systems at all), it has jettisoned most of SQL's functionality and accepts only a very restricted subset of SQL. Thus, mSQL's script looks a lot different:
DROP TABLE BOOK CREATE TABLE BOOK ( ARTICLE_NO INTEGER NOT NULL, AUTHOR_FIRST_NAMES CHARACTER(30), AUTHOR_LAST_NAMES CHARACTER(30), TITLE CHARACTER(30), ISBN CHARACTER(13), WHOLESALE_PRICE MONEY, RETAIL_PRICE MONEY, COPIES_AVAILABLE INTEGER ) DROP TABLE CUSTOMER CREATE TABLE CUSTOMER ( CUSTOMER_NO INTEGER NOT NULL, FIRST_NAMES CHARACTER(30), LAST_NAMES CHARACTER(30), STREET CHARACTER(30), HOUSE_NO SMALLINT, POSTCODE CHARACTER(7), TOWN CHARACTER(30), ISO_COUNTRY_CODE CHARACTER(2) ) DROP TABLE BOOKORDER CREATE TABLE BOOKORDER ( ORDER_NO INTEGER NOT NULL, CUSTOMER_NO INTEGER NOT NULL, ORDERED DATE, DELIVERY DATE, STATUS CHARACTER(1) ) DROP TABLE ORDER_POSITION CREATE TABLE ORDER_POSITION ( POSITION_NO INTEGER NOT NULL, ORDER_NO INTEGER NOT NULL, ARTICLE_NO INTEGER NOT NULL, NUMBER SMALLINT ) DROP TABLE RATING CREATE TABLE RATING ( RATING_NO INTEGER NOT NULL, ARTICLE_NO INTEGER NOT NULL, SCORE SMALLINT, COMMENT TEXT(255) )
Nearly all of the constraints have disappeared, and
CHARACTER VARYING have been replaced by
There is an annoying deficiency in mSQL's monitor program: it doesn't seem to accept SQL scripts fed into it from standard input. Thus, one needs to cut and paste the code. mSQL will complain about semicolons, too; I ended up feeding the commands into it one by one and terminating each with \g (the "go" 'slash command').
Solid state disks (SSDs) made a splash in consumer technology, and now the technology has its eyes on the enterprise storage market. Download this eBook to see what SSDs can do for your infrastructure and review the pros and cons of this potentially game-changing storage technology.
- 1Linux Top 3: GNOME 3.12 and New Betas for Ubuntu 14.04 and OpenMandriva Lx 2014.0
- 2Linux Top 3: Linus Lashes out, Linux 3.14 Gets PIE and Ubuntu One is Done.
- 3Linux Top 3: Ubuntu 14.04, Debian Gives Squeeze More Life and Red Hat Goes Atomic
- 4Linux Top 3: RHEL 6.5, Debian 7.2 and EOL for Linux 3.0.x
- 5Linux Top 3: CoreOS, Oracle Enterprise Linux 7 and Ubuntu 14.10