Contents
What is the storage space required by datetime?
Date and Time Data Types
| Data Type | Storage Requirement |
|---|---|
| TIME | 3 bytes |
| DATETIME | 8 bytes |
| TIMESTAMP | 4 bytes |
| YEAR | 1 byte |
What is the difference between char and varchar in MySQL?
CHAR is fixed length while VARCHAR is variable length. That means, a CHAR(x) string has exactly x characters in length, including spaces. A VARCHAR(x) string can have up to x characters and it cuts off trailing spaces, thus might be shorter than the declared length.
What does varchar 200 mean?
94. 100 characters. This is the var (variable) in varchar : you only store what you enter (and an extra 2 bytes to store length upto 65535) If it was char(200) then you’d always store 200 characters, padded with 100 spaces.
How does extra empty columns affect table size?
Normalize that field if you can. This question looks very similar: do extra empty columns affect sql table size significantly? It looks like the answer is yes it does take up space, but there is a compression algorithm for columns with lots of null values.
Is the storage space in an empty column the same?
Regardless of the length you define for your varchar column, the storage space used by an empty column will be the same. This only addresses the space used by the varchar column and does not consider the total storage space used by the row, its indexes, primary keys and other columns.
How to make one column fill the remaining space in a table?
This column should fill the remaining space but should be truncated if the text is too long. This column should fill the remaining space but should be truncated if the text is too long. Except for the ellipsis it is working well.
How to make the middle column take up space?
The middle column ( .extend) should take the rest of the space (so the table will stay within 100% width of its parent container) and the text within .extend should be ellipsised before it needs to break to a seconds line. Is there any solution for this?