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Database Search Tips

Boolean Operators

  • AND
    diabetes AND elderly
  • OR
    elderly OR aged
  • NOT
    diabetes NOT children

Modifiers and Truncation

  • Use quotes for exact phrases.
    Example: "tobacco smoke pollution"
  • Use parentheses to group terms.
    ("tobacco smoke pollution" AND child)
  • Use the asterisk for branching terms. This finds any words that starts with the stem term.
    Example: child* (includes child OR children OR childhood)

Building a Search Query

Example search using Boolean operators, quotes, parentheses, and wildcard:
("tobacco smoke pollution" OR "secondhand smoke") AND child* AND (lung* OR "cardiovascular system")