Hi, how can I use "ROWNUM" to delete a specific row? just ROWNUM only not ROW_NUMBER() or ROWID.
I can select specific row using ROWNUM but I cannot use it in DELETE or UPDATE operation.
Sample Query in Select Statement:
...If, we assign the rank to the column
Ex:
Name. . . . . . Rank
A. . . . 1
B 2
C . . . 3
When the user adds the data, the rank is saved in DB(database).
How to update the rank in DB, when user delete the data using knockout?
On click of delete, there is one function called Remove row
And in that function table row<tr> is removed using knockout.
Example: if we delete row B its order will be, -1 as deleted item will have rank/order -1 and order/rank of c will be 2
Is, there any alternative way to reset the column value in SQL or something else?
Please, suggest me
Thank you
...One of my projects was working properly, and then I shifted it into another pc, now same code, throws the below error for some SQL queries.
SqlException: MSDTC on server is unavailable....
I am trying to run the below query which works fine without AVG function, but when using AVG it doesn't work, here is the query
...I want sum of two column values from two different tables, how can I do it using SQL?
Suppose, these are my two tables, Table 1
...I am new to Database systems and I don't really have the best lecturer and we are learning about Relational algebra and relational calculus, not many videos or help online.
Please can someone assist me with this topic as i would like to get further knowledge
...Can i have example of declare table and temp table in sql ? and how the update operation can be used on it with real life scenario ?
...
I would like to know a sql query to find all missing dates between two dates , suppose my sql table is as below
|
ID |
Date |
|
1 |
2018-1-10 |
|
2 |
2018-1-12 |
|
3 |
2018-1-13 |
|
4 |
2018-1-15 |
|
5 |
2018-1-17 |
|
6 |
2018-1-18 |
|
7 |
2018-1-20 |
|
8 |
2018-1-21 |
I need to run sql query which will return missing dates from date column like ‘2018-1-11’ , ‘2018-1-14’.
...
I have to write a pseudocode program to read the two sample files, calculate and print the final mark for each subject, as well as the average final mark per student.
Document the code well using comments.
The final mark is calculated as 25% of the year mark, 25% of the prac mark and 50% of the exam mark.
Assume the records of the two files are arranged in Student number (S-no) sequence. Note that some students have more subjects than others….
I was tasked with the above program and im not sure how to express this in pseudo code.
...