Can I use VARCHAR for date?

Can I use VARCHAR for date?

The VARCHAR version is culture specific. You can’t easily sort the dates.

Should I always use VARCHAR 255?

You could use varchar(max) but that changes the way your data is stored and could impact performance; but without knowing more about your application and the size/volume of the data it’s hard to give advice. VARchar (255) is generally abad choice unless you need that much space. Bad data in means bad data out.

When should I use VARCHAR or string?

1 Answer

1. Use varchar if you want to have a length constraint.
2. Use string if you don’t want to restrict the length of the text.

Why we use varchar 255 in SQL?

Storage Information : The length can be specified as a value from 0 to 65,535. The effective maximum length of a VARCHAR is subject to the maximum row size (65,535 bytes, which is shared among all columns) and the character set used. VARCHAR(255) stores 255 characters, which may be more than 255 bytes.

Is varchar faster than text?

Some Differences Between VARCHAR and TEXT A VARCHAR can be part of an index whereas a TEXT field requires you to specify a prefix length, which can be part of an index. VARCHAR is stored inline with the table (at least for the MyISAM storage engine), making it potentially faster when the size is reasonable.

Is text slower than varchar?

Short answer: No practical, performance, or storage, difference. Long answer: There is essentially no difference (in MySQL) between VARCHAR(3000) (or any other large limit) and TEXT .

Can a date be stored in A varchar column?

You can store date in a VARCHAR column, you can also store non-dates in that VARCHAR column.

How to convert nvarchar to datetime in SQL?

To convert your string to a datetime: declare @date nvarchar (25) set @date = ‘2011-09-28 18:01:00’ — To datetime datatype SELECT CONVERT (datetime, @date)

How big is a varchar date in PHP?

Which means your VARCHAR date is at least 2.67 times the size of a DATE. 3.33 if you include separators. Or much larger if your string dates are not formatted sets of digits. That’s not huge, and probably not a concern for space on disk. But for space in memory, when you need to fetch or sort the data, it adds up.

Is it possible to change the format of varchar?

The VARCHAR version is culture specific. You can’t easily sort the dates. It is difficult to change the format if you want to later. It is unconventional, which will make it harder for other developers to understand.