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expr
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is_null.sql

is_null.sql 101 B
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  1. /* postgres can not */
    2. 

  2. select
    3. 

  3.     1/0 is NULL,
    4. 

  4.     1/0 isnull,
    5. 

  5.     1/0 is not NULL,
    6. 

  6.     1/0 notnull;
    7.