Syntax

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Read syntax diagramSkip visual syntax diagram        .-,---------------------------------------------------------.
        V                                                           |
>>-SET----+-variable-- = --+-expression-+-------------------------+-+-><
          |                '-NULL-------'                         |
          |    .-,--------.               .-,--------------.      |
          |    V          |               V                |      |
          '-(----variable-+--)-- = --(--+---+-expression-+-+-+--)-'
                                        |   '-NULL-------'   |
                                        '-row-fullselect-----'