mysql text to decimal
SELECT CAST(colName AS DECIMAL(10,2))
FROM tableName
mysql text to decimal
SELECT CAST(colName AS DECIMAL(10,2))
FROM tableName
mysql 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 test
cast float mysql
SELECT
integer_column + 0.0 AS float_column
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