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(mysql.info) boolean-values

Info Catalog (mysql.info) hexadecimal-values (mysql.info) literals (mysql.info) bit-field-values
 
 9.1.4 Boolean Values
 --------------------
 
 The constants `TRUE' and `FALSE' evaluate to `1' and `0', respectively.
 The constant names can be written in any lettercase.
 
      mysql> SELECT TRUE, true, FALSE, false;
              -> 1, 1, 0, 0
 
Info Catalog (mysql.info) hexadecimal-values (mysql.info) literals (mysql.info) bit-field-values
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