TeacherApprover Table - Table format in Database
TeacherID ApproverID ApproverLevel
15122 4 1
15122 2 2
15122 3 3
i need the result as in select Statement- it should display as below
TeacherID ApproverID ApproverID2` ApproverID3
15122 4 2 3
i tried directly binding in front end but i have some issues after binding like this, So i want to try getting the result in Dataset directly from backend.
please guide me
I think you need approver id by teacher Id.
So I think you can get data using query,
SELECT ApproverID from table_name where teacherID = 15122;
Then handle the result according to your requirement.
Create new table having column as you needed.
insert into that new table .
INSERT INTO table2
(column_name(s))
SELECT column_name(s)
FROM table1;
Related
what if I have two strings: "123" and "abc". I want to select username if there's username "123" then choose it, if not found (null) then select username where "abc"
I have a table called USERS, this table responsibility with workflow engine account. I want to show columns in USERS:
username
email
usr_firstname
usr_lastname
I am using concat to merge column 3 and 4 with space between it. In the office, there are 2 types of employee:
origin/internal employee
outsource/partner employee
Origin employee login into every system using LDAP (FirstName.LastName), but outsource or partner employee login individually just for our workflow engine using employee identity number.
In this case, if I use something like:
Where username = 'employeenumber' or username = 'LDAPacc' the result is both account (used and unused for outsource) they appear. I want to show just 1 rows and 1 query but it's work with internal or even outsource (they will got data correctly for outsource).
You can use like this query;
SELECT *
FROM TABLE
WHERE username IN ('123', 'abc')
AND (username='123' OR NOT EXISTS(SELECT * FROM TABLE WHERE username='abc'))
You could use COALESCE.
COALESCE selects the first non null value out of the ones supplied.
So you could use....
SELECT COALESCE(String_123, string_ABC);
If string_123 has a value it will select that, otherwise it will select string_ABC unless of course they are both null.
So to be safe include a default value.......
SELECT COALESCE(String_123, string_ABC, string_Default);
I've found when I tested my logic to mysql tryit editor by w3schools and It's worked properly what I need. Here's my query:
SELECT * FROM Customers WHERE CustomerID = 'zz' OR (NOT EXISTS (SELECT * FROM Customers WHERE CustomerID = 'zz') AND CustomerID = '3')
let's say CustomerID is equivalent to my username column, then I tried to swap 'zz' and '3' value and it's still works. I hope there's more simple query than this
I have a table (pdt_1) in database (db_1) and another table (pdt_2) in another database (db_2).
I met pdt_1 and pdt_2 to find pdt_1 products not present and published in pdt_2.
functional code :
SELECT * FROM db_1.pdt_1 AS lm
WHERE lm.product_sku
NOT IN (SELECT DISTINCT product_cip7 FROM db_2.pdt_2)
AND lm.product_publish=‘Y'
finally, I need to insert the result of this query in pdt_2.
However, the structure of pdt_1 and pdt_2 are different.
Example:
- columns's names
- columns's numbers
I also need an auto_increment id for pdt_1 products inserted into pdt_2.
I need help.
NB : sorry for my poor english :(
If you want a new table with just the id and product_sku, try:
INSERT INTO new_table # with id and product_sku from first table
SELECT pdt_1.id,
pdt_1.product_sku
FROM db_1.pdt_1
LEFT JOIN db_2.pdt_2
ON pdt_1.product_sku = pdt_2.product_cip7
WHERE pdt_2.product_cip7 IS NULL
AND pdt_1.product_publish = 'Y'
I have MySQL and the query is:
select name,re_type from myTable
I want to replace all values of type:
1 = student
2 = teacher
So the result should be:
name re_type
---------------
Ron Student
Mac Teacher
Not like:
name re_type
---------------
Ron 1
Mac 2
Is it possible to make a query like that so I get the desired result in MySQL ?
You can use a CASE statement
SELECT name, CASE WHEN re_type = 1 THEN 'Student' WHEN re_type = 2 THEN 'Teacher' ELSE 'Donno' END AS re_type_text
FROM myTable
You can use a joint table that will store labels for your re_type like
re_type_id re_type_label
1 student
2 teacher
And alter your query by :
select t.name,l.re_type_label
from myTable t
inner join labelsTable l
on l.re_type_id = t.re_type
I think he wants to keep IDs on re_type field, and just decoding them when extracting.
You can use CASE WHEN or ELT(), MySql equivalent to Oracle's Decode(), like explained here
, but the Best Practice is to create an external table containing re_type and re_type_description fields, so if tomorrow you'll have new values, you don't have to change all your queries.
I have a table 'movies' with three Columns: 'id', 'master_id' and 'searchMe' (simplified). I have another Table 'temp_ids' with a single column: 'id'. It is a temporary table, but I don't think that matters.
When I make a query on my table 'movies' like
SELECT `id`, `master_id` FROM 'movies' WHERE searchMe = '1';
I get a multi column result. Now I want to insert every id and every master_id into the 'temp_ids'-Table, but one at a time. So if my result is
id_1 | master_1
id_2 | master_2
id_3 | NULL
I want my temp_ids to look like
id_1
master_1
id_2
master_2
id_3
So I want to convert every single column in the result into its own row. How can I do that in an elegant way?
I know I can do it in multiple queries, searching for id and master_id separatly, and I know I can solve that problem with PHP or so. But I would prefer it to solve that problem in a single mysql-query, if such a thing is possible.
I made a sqlfiddle for this:
http://sqlfiddle.com/#!2/b4a7f/2
To SELECT the data you can use a UNION ALL for this:
SELECT `id`
FROM movies
WHERE searchMe = 1
union all
SELECT `master_id`
FROM movies
WHERE searchMe = 1
and master_id is not null
see SQL Fiddle with Demo
Doing it this way, you cannot distinguish between what value comes from each column, so you can always add an indicator, this will give you two columns but then you know where the data came from:
SELECT `id`, 'id' type
FROM movies
WHERE searchMe = 1
union all
SELECT `master_id`, 'master'
FROM movies
WHERE searchMe = 1
and master_id is not null
Then you would just use this query to INSERT INTO temp using this SELECT
It would be like this
INSERT INTO temp_ids(id)
SELECT id
FROM
(
SELECT id
FROM FirstTable
UNION
SELECT master AS id
FROM SecondTable
) t
The query is
Select id from TableA
where typ_cd="NT"
and id not in
( select id from TableA where typ_cd="BB")
I need to find those id's whose type_cd ="NT" and compare those id's with the same table which are not present for type_cd="BB" .I pretty confused why the above query is not returning the correct values.
Edit: -I'm referencing the same table and there are no null values for the column ID
Please let me know how can i achieve the same result in sql server so that i can try to write an equivalent query in sybase
TableA
id typ_cd
1 NT
1 BB
3 NT
4 NT
4 BB
I need the id=1 as the result since the id=1 is present for typ_cd=NT but not for typ_cd=BB
But at present with the above query im getting null in sybase
Replace the double quotes with single quotes.
Select id from TableA
where typ_cd='NT'
and id not in
( select id from TableA where typ_cd='BB')