Optimising Marksheet Database
- I am trying to design a database for mark sheet data of a school having different types of exams of different levels or class.
- Is it possible to have single table where I can store data in string (array serialize PHP) and perform a search based on subjects easily (Maximum/Minimum/Average).
The table look something like this with bit variations-
Class 5
XXXXX ------ Math ----- Hindi ----- English
Amit -------- 10 ------- 20 ----------31
Alok -------- 10 ------- 20 ----------31
Class 8
XXXXX ------ Math ----- Hindi ----- English ---- Science
Amit -------- 10 ------- 20 ----------31 ----------20
Alok -------- 10 ------- 20 ----------31 ----------23
Using PHP's array serialize I will have marks data in string as
a:4:{s:4:"math";i:20;s:5:"hindi";i:30;s:7:"english";i:23;s:7:"science";i:10;}
Should I have separate table or can I have the condensed table so that database does not become too heavy with too many rows?
mysql database-design innodb php
asked Feb 9 '17 at 7:42
Vishal Kumar SahuVishal Kumar Sahu
1062
bumped to the homepage by Community♦ 28 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
- I am trying to design a database for mark sheet data of a school having different types of exams of different levels or class.
- Is it possible to have single table where I can store data in string (array serialize PHP) and perform a search based on subjects easily (Maximum/Minimum/Average).
The table look something like this with bit variations-
Class 5
XXXXX ------ Math ----- Hindi ----- English
Amit -------- 10 ------- 20 ----------31
Alok -------- 10 ------- 20 ----------31
Class 8
XXXXX ------ Math ----- Hindi ----- English ---- Science
Amit -------- 10 ------- 20 ----------31 ----------20
Alok -------- 10 ------- 20 ----------31 ----------23
Using PHP's array serialize I will have marks data in string as
a:4:{s:4:"math";i:20;s:5:"hindi";i:30;s:7:"english";i:23;s:7:"science";i:10;}
Should I have separate table or can I have the condensed table so that database does not become too heavy with too many rows?
mysql database-design innodb php
asked Feb 9 '17 at 7:42
Vishal Kumar SahuVishal Kumar Sahu
1062
bumped to the homepage by Community♦ 28 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Have you tried JSON structure?
– SQL.RK
Feb 9 '17 at 12:20
I have advantage ofserializeoverJSON... Although JSON is efficient too.
– Vishal Kumar Sahu
Feb 9 '17 at 15:06
add a comment |
- I am trying to design a database for mark sheet data of a school having different types of exams of different levels or class.
- Is it possible to have single table where I can store data in string (array serialize PHP) and perform a search based on subjects easily (Maximum/Minimum/Average).
The table look something like this with bit variations-
Class 5
XXXXX ------ Math ----- Hindi ----- English
Amit -------- 10 ------- 20 ----------31
Alok -------- 10 ------- 20 ----------31
Class 8
XXXXX ------ Math ----- Hindi ----- English ---- Science
Amit -------- 10 ------- 20 ----------31 ----------20
Alok -------- 10 ------- 20 ----------31 ----------23
Using PHP's array serialize I will have marks data in string as
a:4:{s:4:"math";i:20;s:5:"hindi";i:30;s:7:"english";i:23;s:7:"science";i:10;}
Should I have separate table or can I have the condensed table so that database does not become too heavy with too many rows?
mysql database-design innodb php
asked Feb 9 '17 at 7:42
Vishal Kumar SahuVishal Kumar Sahu
1062
- I am trying to design a database for mark sheet data of a school having different types of exams of different levels or class.
- Is it possible to have single table where I can store data in string (array serialize PHP) and perform a search based on subjects easily (Maximum/Minimum/Average).
The table look something like this with bit variations-
Class 5
XXXXX ------ Math ----- Hindi ----- English
Amit -------- 10 ------- 20 ----------31
Alok -------- 10 ------- 20 ----------31
Class 8
XXXXX ------ Math ----- Hindi ----- English ---- Science
Amit -------- 10 ------- 20 ----------31 ----------20
Alok -------- 10 ------- 20 ----------31 ----------23
Using PHP's array serialize I will have marks data in string as
a:4:{s:4:"math";i:20;s:5:"hindi";i:30;s:7:"english";i:23;s:7:"science";i:10;}
Should I have separate table or can I have the condensed table so that database does not become too heavy with too many rows?
mysql database-design innodb php
mysql database-design innodb php
asked Feb 9 '17 at 7:42
Vishal Kumar SahuVishal Kumar Sahu
1062
asked Feb 9 '17 at 7:42
Vishal Kumar SahuVishal Kumar Sahu
1062
asked Feb 9 '17 at 7:42
Vishal Kumar SahuVishal Kumar Sahu
1062
asked Feb 9 '17 at 7:42
Vishal Kumar SahuVishal Kumar Sahu
1062
asked Feb 9 '17 at 7:42
Vishal Kumar SahuVishal Kumar Sahu
1062
1062
bumped to the homepage by Community♦ 28 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ 28 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Have you tried JSON structure?
– SQL.RK
Feb 9 '17 at 12:20
I have advantage ofserializeoverJSON... Although JSON is efficient too.
– Vishal Kumar Sahu
Feb 9 '17 at 15:06
add a comment |
Have you tried JSON structure?
– SQL.RK
Feb 9 '17 at 12:20
I have advantage ofserializeoverJSON... Although JSON is efficient too.
– Vishal Kumar Sahu
Feb 9 '17 at 15:06
Have you tried JSON structure?
– SQL.RK
Feb 9 '17 at 12:20
Have you tried JSON structure?
– SQL.RK
Feb 9 '17 at 12:20
I have advantage of
serialize over JSON... Although JSON is efficient too.– Vishal Kumar Sahu
Feb 9 '17 at 15:06
I have advantage of
serialize over JSON... Although JSON is efficient too.– Vishal Kumar Sahu
Feb 9 '17 at 15:06
add a comment |
1 Answer
1
active
oldest
votes
You really should not hide the data you want to do arithmetic inside any kind of structure.
Use a table with 4 columns: class, student, subject, score.
Then things like each student's avg score:
SELECT student,
AVG(score)
FROM tbl
GROUP BY student;
answered Feb 10 '17 at 1:00
Rick JamesRick James
41.5k22258
You are right. But what if data has variable fields or subjects.? How can I handle that?
– Vishal Kumar Sahu
Feb 18 '17 at 7:47
"Variable fields"? Perhaps we need to see some more data, plus more desired output. The new example(s) should highlight what you are asking.
– Rick James
Feb 18 '17 at 16:14
Variable fields mean, I need data in variable columns...
– Vishal Kumar Sahu
Feb 18 '17 at 22:06
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You really should not hide the data you want to do arithmetic inside any kind of structure.
Use a table with 4 columns: class, student, subject, score.
Then things like each student's avg score:
SELECT student,
AVG(score)
FROM tbl
GROUP BY student;
answered Feb 10 '17 at 1:00
Rick JamesRick James
41.5k22258
You are right. But what if data has variable fields or subjects.? How can I handle that?
– Vishal Kumar Sahu
Feb 18 '17 at 7:47
"Variable fields"? Perhaps we need to see some more data, plus more desired output. The new example(s) should highlight what you are asking.
– Rick James
Feb 18 '17 at 16:14
Variable fields mean, I need data in variable columns...
– Vishal Kumar Sahu
Feb 18 '17 at 22:06
add a comment |
You really should not hide the data you want to do arithmetic inside any kind of structure.
Use a table with 4 columns: class, student, subject, score.
Then things like each student's avg score:
SELECT student,
AVG(score)
FROM tbl
GROUP BY student;
answered Feb 10 '17 at 1:00
Rick JamesRick James
41.5k22258
You are right. But what if data has variable fields or subjects.? How can I handle that?
– Vishal Kumar Sahu
Feb 18 '17 at 7:47
"Variable fields"? Perhaps we need to see some more data, plus more desired output. The new example(s) should highlight what you are asking.
– Rick James
Feb 18 '17 at 16:14
Variable fields mean, I need data in variable columns...
– Vishal Kumar Sahu
Feb 18 '17 at 22:06
add a comment |
You really should not hide the data you want to do arithmetic inside any kind of structure.
Use a table with 4 columns: class, student, subject, score.
Then things like each student's avg score:
SELECT student,
AVG(score)
FROM tbl
GROUP BY student;
answered Feb 10 '17 at 1:00
Rick JamesRick James
41.5k22258
You really should not hide the data you want to do arithmetic inside any kind of structure.
Use a table with 4 columns: class, student, subject, score.
Then things like each student's avg score:
SELECT student,
AVG(score)
FROM tbl
GROUP BY student;
answered Feb 10 '17 at 1:00
Rick JamesRick James
41.5k22258
answered Feb 10 '17 at 1:00
Rick JamesRick James
41.5k22258
answered Feb 10 '17 at 1:00
Rick JamesRick James
41.5k22258
answered Feb 10 '17 at 1:00
Rick JamesRick James
41.5k22258
41.5k22258
You are right. But what if data has variable fields or subjects.? How can I handle that?
– Vishal Kumar Sahu
Feb 18 '17 at 7:47
"Variable fields"? Perhaps we need to see some more data, plus more desired output. The new example(s) should highlight what you are asking.
– Rick James
Feb 18 '17 at 16:14
Variable fields mean, I need data in variable columns...
– Vishal Kumar Sahu
Feb 18 '17 at 22:06
add a comment |
You are right. But what if data has variable fields or subjects.? How can I handle that?
– Vishal Kumar Sahu
Feb 18 '17 at 7:47
"Variable fields"? Perhaps we need to see some more data, plus more desired output. The new example(s) should highlight what you are asking.
– Rick James
Feb 18 '17 at 16:14
Variable fields mean, I need data in variable columns...
– Vishal Kumar Sahu
Feb 18 '17 at 22:06
You are right. But what if data has variable fields or subjects.? How can I handle that?
– Vishal Kumar Sahu
Feb 18 '17 at 7:47
You are right. But what if data has variable fields or subjects.? How can I handle that?
– Vishal Kumar Sahu
Feb 18 '17 at 7:47
"Variable fields"? Perhaps we need to see some more data, plus more desired output. The new example(s) should highlight what you are asking.
– Rick James
Feb 18 '17 at 16:14
"Variable fields"? Perhaps we need to see some more data, plus more desired output. The new example(s) should highlight what you are asking.
– Rick James
Feb 18 '17 at 16:14
Variable fields mean, I need data in variable columns...
– Vishal Kumar Sahu
Feb 18 '17 at 22:06
Variable fields mean, I need data in variable columns...
– Vishal Kumar Sahu
Feb 18 '17 at 22:06
add a comment |
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Have you tried JSON structure?
– SQL.RK
Feb 9 '17 at 12:20
I have advantage of
serializeoverJSON... Although JSON is efficient too.– Vishal Kumar Sahu
Feb 9 '17 at 15:06