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What is more reliable char or varchar?

which is more reliable if 600 char text to be created as char or varchar in DB2
Jul 23 '12 #1
4 1879
lyodmichael
75 64KB
varchar is flexible but if you will using VARCHAR for everything robs your database of critical functionality, data consistency, and performance.

#tip
Jul 23 '12 #2
Rabbit
12,516 Expert Mod 8TB
Define reliable. I don't know what you mean by that term. By the standard definition of reliable, they're both equally reliable. The value's not going to change all of a sudden. So you must have some other definition of reliable.
Jul 23 '12 #3
@Rabbit
what happen in db2 performance, storage or other issue if I allocate the size because some data content per row might be is not more than 100 char.
Jul 24 '12 #4
Rabbit
12,516 Expert Mod 8TB
There's slightly more overhead performance wise but it's not likely to be noticeable. As for space, that will depend on the average length of the values in the field. You will have to do the math to figure whether the char or varchar will be better.
Jul 24 '12 #5

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