In tech, what does DB usually stand for?
AnswerDatabase
DB is common shorthand for database.
Coding · Facts & stats
DB facts & stats
7 fact-checked facts about databases and SQL, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What is a primary key?
AnswerA column that uniquely identifies each row
Primary key values must be unique.
Going deeper
Which SQL clause filters rows by a condition?
AnswerWHERE
WHERE keeps only rows that meet the condition.
In the ACID properties of transactions, what does the A stand for?
AnswerAtomicity
Atomicity means a transaction happens fully or not at all.
Which of these is a NoSQL document database?
AnswerMongoDB
MongoDB stores JSON-like documents.
Expert level
What does a database index mainly speed up?
AnswerFinding rows in queries
Indexes speed lookups at the cost of extra storage and writes.
In which year was SQLite first released?
Answer2000
D. Richard Hipp released SQLite in August 2000.
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