Null symbol may refer to:
- Null character, U+0000, U+2400 "symbol for null" (␀), a single-character glyph "NUL"
- Null sign (∅), the empty set
- Null (SQL) (ω), a special marker and keyword
NULLin SQL - Empty string (λ, Λ, or ε), in formal language theory
See also edit
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