The results we get from a table we may have to display in an order. The
result may be from highest to lowest or lowest to highest in a numeric
field or from A to Z or Z to A in a text or varchar field. We may require
a combination of this also.
SELECT * FROM STUDENT ORDER BY MARK
id
name
class
mark
sex
19
Tinny
Nine
18
male
17
Tumyu
Six
54
male
29
Tess Played
Seven
55
male
3
Arnold
Three
55
male
6
Alex John
Four
55
male
22
Reggid
Seven
55
female
10
Big John
Four
55
female
4
Krish Star
Four
60
female
5
John Mike
Four
60
female
20
Jackly
Nine
65
female
Highest to lowest order
We can apply this to our numeric field mark to display the list in order of
lowest mark to highest mark by using the ASC command ( ascending command )
. Please note that by default all order by commands are in ascending order only.
Here is the command to display the records in decending order ( from highest to
lowest ) based on the mark field.
SELECT * FROM `student` ORDER BY mark desc
Here the total mark will be displayed in the order of highest to lowest and
class will not be considered. To display the records in order of mark in a
class, we have to use to field names in the order by clause. Here is the code to
display the records in the order of class and then in the order of marks. This
will give a highly use full way by displaying all the records in order of class
and within the class in order of marks.
SELECT * FROM `student` ORDER BY class desc, mark desc
Here is the command to display the records in the order of class
SELECT * FROM `student` ORDER BY class
id
name
class
mark
1
John Deo
Four
75
4
Krish Star
Four
60
5
John Mike
Four
60
6
Alex John
Four
55
2
Max Ruin
Three
85
3
Arnold
Three
55
Here the records are returned in the order by class from A to Z . We can
reverse the order by specifying in our sql command to change the order to
Descending that is from Z to A. We have to add desc to the ORDER BY clause. Here
is the command to do that
SELECT * FROM `student` ORDER BY class desc
Order by more than one column of a table
We can display list of students based on their mark and based on their name.
SELECT * FROM student ORDER BY mark , name
This will list on ascending order of mark. When there are more than one student got the same mark ( say 88 ) then the names of them will be listed alphabetically.
So the list will display Bigy above Giff Tow though both of them got equal mark ( say 88 )
If you want to reverse the order of Names you can change the query like this
SELECT * FROM student ORDER BY mark , name DESC
If you want listing should be from highest mark to lowest mark then query should be
SELECT * FROM student ORDER BY mark DESC, name DESC
How to use in PHP Script
You can read more on SQL SELECT query to see how this query can be used in PHP Script to display records. Only the query part is required to be changed.
order by string as integer
While listing in order by any VARCHAR or string column having number, we need to convert them to number by using CAST and then use order by query.
Create one more column diff , VARCHAR ( 3 ) then update it by using this query
UPDATE student set diff = 100-mark
Now use order by query.
SELECT * FROM `student` order by diff desc
You will see the list like this.
id
name
class
mark
sex
diff
19
Tinny
Nine
18
male
82
12
Recky
Six
94
female
6
17
Tumyu
Six
54
male
46
22
Reggid
Seven
55
female
45
29
Tess Played
Seven
55
male
45
3
Arnold
Three
55
male
45
6
Alex John
Four
55
male
45
10
Big John
Four
55
female
45
4
Krish Star
Four
60
female
40
5
John Mike
Four
60
female
40
This is listed based on the first char of diff column.
We need to change the column value by using CAST and then use order by
SELECT * FROM `student` ORDER BY CAST(diff as unsigned) DESC
In a discussion forum, members create a Topics ( with title ) and other or same member post reply to this topic.
We have two different tables. One is storing topic with titles and other table is storing topic replies. Each record stores date and time of post. We need to display top 10 recent posts by taking data from title and reply table.
Our order by query should collect data based on recent posts ( it can be topic or reply ) by comparing the posting date and time.
SELECT dt , topic_id,userid
FROM (
SELECT topic_id, rdtp AS dt, userid
FROM forum_reply
UNION ALL
SELECT topic_id, tdtp AS dt, userid
FROM forum_topics
) t
ORDER BY dt DESC limit 0,10
Here we used date and time field dt ( of both tables ) to display records in order of data and time.
just want to asked guys, hope you help me this is the scenario i have at least 3 data in my database from ID 1, 2, 3, and i want to display this file or post, data display is OK but i want to display like this 3, 2, 1 how can make it that way.
annu
10-10-2014
Suppose if we are using 1st, 2nd and 3rd in class instead of two three and four how will this query will work in that case
Steve Highley
27-10-2014
The desc qualifier (which stands for descending, i.e. high to low) changes the sequence from the default of low to high.
Data is ordered depending on the data type. Text is ordered according to collating sequence, numbers from low to high (e.g. -100 is before 5), and dates are ordered from earliest to latest.
So 'Three' is greater than 'Four' because T is after F in the collating sequence.
But 3 is less than 4 whether stored as numbers or text.
I hope that helps.
yamsoti
26-03-2016
I want to display 2 highest mark from class 4, it has marks 70, 60, 60, 50. How do I prepare the query.
The results we get from a table we may have to display in an order. The
result may be from highest to lowest or lowest to highest in a numeric
field or from A to Z or Z to A in a text or varchar field. We may require
a combination of this also.
