SQL
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Replace a NULL with a specific value
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MySQL
The SQL standard is
COALESCE
SELECT code, name, COALESCE(leader, 'NO LEADER RECORDED!') FROM party
Specific to MySQL
none
Related links:
FUNCTIONS
Concatenate strings.
Substring: Extracting part of a string.
lower case
Finding a substring in a string
Formatting numbers to two decimal places.
Replace a NULL with a specific value
Conditional values
Get the date and time right now.
Format dates.