mysql cast to varchar
SELECT CAST(aField as UNSIGNED) from table;
-- for VARCHAR use CHAR(50), INT use UNSIGNEDmysql cast to varchar
SELECT CAST(aField as UNSIGNED) from table;
-- for VARCHAR use CHAR(50), INT use UNSIGNEDmysql cast null to string
#If you really must output every values including the NULL ones
select IFNULL(prereq,"") from test
#OR, Coalesce will return the first non-null argument passed to it
#from left to right. If all arguemnts are null, it'll return null, but we're forcing an empty string there, so no null values will be returned.
SELECT COALESCE(prereq, '') FROM testCopyright © 2021 Codeinu
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