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Escape Characters

docs/en/14-reference/03-taos-sql/90-escape.md

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Escape Character Table

Character SequenceRepresents Character
\'Single quote '
\"Double quote "
\nNewline character
\rCarriage return
\tTab character
\\Backslash \
\%% see below for rules
\__ see below for rules

Rules for Using Escape Characters

  1. Identifiers contain escape characters (database names, table names, column names, aliases)
    1. Regular identifiers: Directly prompt an error for the identifier, because identifiers are required to be numbers, letters, and underscores, and cannot start with a number.
    2. Backtick `` identifiers: Keep as is, do not escape
  2. Data contains escape characters
    1. Encountering the defined escape characters will trigger escaping (% and _ see below), if there is no matching escape character, the escape symbol \ will be ignored (\x remains as is).
    2. For % and _, since these two characters are wildcards in like, use \% and \_ in pattern matching like to represent the characters % and _ themselves. If \% or \_ are used outside the like pattern matching context, their results are the strings \% and \_, not % and _.