I have values in a column named Date as a nvarachar data type in the form of mmddyy and want to convert the values to a date datatype in the form of yyyy-mm-dd. What sql colde can I use to convert the value?
example 02121955 -> 1955-02-12
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A few notes: dates are not held internally in that format, or any other date-like format. The question says the source is 6 characters but the example shows 8. If you need to find the century you'll have to decide on rules for that.
Try this out:
declare @vardate varchar(100)='02121955' set @vardate= SUBSTRING(@vardate, 1, 2)+'-'+ SUBSTRING(@vardate, 3, 2)+'-'+SUBSTRING(@vardate, 5, 4) select CONVERT(date, @vardate) as dataconverted
This should do the job for the whole column
UPDATE myTable SET columnName = SUBSTRING(columnName, 1, 2)+'-'+ SUBSTRING(columnName, 3, 2)+'-'+SUBSTRING(columnName, 5, 4) ALTER TABLE myTable ALTER COLUMN columnName date