Data update
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10248 changed files with 63654 additions and 6775 deletions
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@ -0,0 +1,9 @@
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SELECT
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IF(can_fly, 'Superman', 'Batman'),
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-- replace NULL with string
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IFNULL(can_fly, 'Not clear if this user can fly'),
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-- alias for IFNULL
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NVL(can_fly, 'Not clear if this user can fly'),
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-- replace '' with NULL
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NULLIF(can_fly, '')
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FROM user;
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