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When should I use VARCHAR or 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.
What is the difference between VARCHAR and VarChar2?
VARCHAR2 is the same as VARCHAR in the oracle database. The main difference is that VARCHAR is ANSI Standard and VARCHAR2 is Oracle standard. The VarChar2 data type is used to store the character values….Difference between char, varchar and VARCHAR2 in Oracle.
| Sno | Char | VarChar/VarChar2 |
|---|---|---|
| 8 | It is 50% much faster than VarChar/VarChar2 | It is relatively slower as compared to Char |
Why VARCHAR is used in SQL?
Also known as Variable Character, it is an indeterminate length string data type. SQL varchar usually holds 1 byte per character and 2 more bytes for the length information. It is recommended to use varchar as the data type when columns have variable length and the actual data is way less than the given capacity.
Is there any difference between varchar ( 10 ) and varchars ( 1000 )?
This means that indeed, a varchar (10) and a varchar (100) containing 2 characters use the same space (which is different for a char, which always uses the full allocated space). Thanks for contributing an answer to Stack Overflow!
What’s the difference between A varchar and a text column?
VARCHAR has a variable max size M up to M = 2¹⁶-1. So you cannot choose the size of TEXT but you can for a VARCHAR. The other difference is, that you cannot put an index (except for a fulltext index) on a TEXT column.
Why do you use varchar to store data?
The reason you use a varchar is exactly why it’s named varchar. It allows you to store variable-sized data elements. Typically, char(10) gives you ten characters, no matter what, padding it with spaces if you insert something shorter.
Do you have to use varchar to create index?
So if you want to have an index on the column, you have to use VARCHAR. But notice that the length of an index is also limited, so if your VARCHAR column is too long you have to use only the first few characters of the VARCHAR column in your index (See the documentation for CREATE INDEX ).