Look up SQL in Wiktionary, the free dictionary.
SQL (short for Structured Query Language) is a domain-specific language used in programming and designed for managing data held in a relational databases.
SQL may also refer to:
- Standard quantum limit, a limit on measurement accuracy at quantum scales in physics
- Squelch, in telecommunications, a circuit function that acts to suppress the audio (or video) output of a receiver in the absence of a strong input signal
- San Carlos Airport (California), an airport in San Mateo County, California, whose IATA designation and FAA LID are SQL
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