SQ, Sq, or sq may stand for:

Square Enix Holdings Co., Ltd. (株式会社スクウェア・エニックス・ホールディングス, Kabushiki gaisha Sukuwea Enikkusu Hōrudingusu) is a Japanese video game developer, publisher, and distribution company that is best known for its role-playing video game franchises, which include Final Fantasy, Dragon Quest, and Kingdom Hearts.

In mathematics, a square root of a number a is a number y such that y2 = a; in other words, a number y whose square (the result of multiplying the number by itself, or y⋅y) is a.

Squatting is the action of occupying an abandoned or unoccupied area of land or a building, usually residential, that the squatter does not own, rent or otherwise have lawful permission to use.

Squash is a ball sport played by two (singles) or four players (doubles) in a four-walled court with a small, hollow rubber ball.

SQL ( ESS-kew-EL or SEE-kwəl, Structured Query Language) is a domain-specific language used in programming and designed for managing data held in a relational database management system (RDBMS), or for stream processing in a relational data stream management system (RDSMS).

Squatting is a posture where the weight of the body is on the feet (as with standing) but the knees and hips are bent.

The square root of 2, or the (1/2)th power of 2, written in mathematics as √2 or 2 1⁄2, is the positive algebraic number that, when multiplied by itself, gives the number 2. Technically, it is called the principal square root of 2, to distinguish it from the negative number with the same property.

SQL injection is a code injection technique, used to attack data-driven applications, in which nefarious SQL statements are inserted into an entry field for execution (e.g.