Fairly new to the SQL area of coding and looking for some assistance.
Essentially have 2 tables 1 for employees and 1 for instore which is where their payment details are stored.
Looking to have a query which lists their name and payment rate which are stored across the two tables.
So far I have
SELECT paymentRate
FROM inStore
WHERE employeeID IN (SELECT employeeID
FROM employee
WHERE employeeID = 'C1234567')
Which gives me the result of the payment rate. I need to have the name displayed with it which is stored in the employee table. However after a while of troubleshooting I am having difficulty with something I am sure is quite simple. However when I try to change my query I keep getting assorted errors. Any assistance would be appreciated! Thanks in advance!
If I understood your query, you mean that you would like the employee name displayed when you do your query? If so you would want to use a Join as part of your sql query.
For example say that you want employee Bob Bobbins to show up you would need a query like the following:
SELECT i.paymentRate, e.FirstName, e.LastName FROM inStore as i
inner join employee as e on i.employeeID = e.employeeID
WHERE i.employeeID ='C1234567'
the as i and e are just ways to establish alias's so you wont need to keep retyping employee.firstname etc over and over again
hope that helps
edit: it would be good as well to have a foreign key relationship established as well for referential integrity purposes
Hope your InStore table contains multiple records against a single employee. Please refer the below sql query. This query is written in T-SQL.
DECLARE #Employee TABLE
(
Id INT,
Name VARCHAR(MAX)
)
DECLARE #InStore TABLE
(
Id INT,
Rate MONEY,
EmpId INT
)
INSERT INTO #Employee ( Id, Name )
VALUES ( 1,'ABC'),( 2,'DEF'),( 3,'GHI')
INSERT INTO #InStore( Id, Rate, EmpId )
VALUES ( 1, 10, 1 ), ( 2, 20, 2 ), ( 3, 30, 3 ),( 4, 40, 3 )
SELECT emp.Id,emp.Name,SUM(ins.Rate)
FROM #Employee emp
INNER JOIN #InStore ins ON ins.EmpId = emp.Id
GROUP BY emp.Id, emp.Name
Related
My mission is to get top 100 rows from all my tables in a database, and union them into one result output.
Since the tables have varying columncount and varying types, the only way I see to do this is to put the row number as columns, and the column name in the first column. Row 1 from all tables will then be represented in column 2 and so forth.
My skills in SQL aren't good enough to figure this one out, so I hope the community can assist me in this.
Here is some code:
--Example table
create table Worker (Id int, FirstName nvarchar(max));
--Some data
insert into Worker values (1,'John'),(2,'Jane'),(3,'Elisa');
--Static pivot example
select * from (select
ROW_NUMBER() over (order by Id) as IdRows, FirstName from worker) as st
pivot
(
max(FirstName) for IdRows in ([1],[2],[3])
) as pt;
--Code to incorporate to get column name on column 1
select name from sys.columns where object_id('Worker') = object_id;
--Cleanup
drop table Worker;
I reckon the static pivot must be dynamic, which is not a problem. The above code is just to create a proof of concept, so I have something to build further on.
End result of query should be like this:
Column 1 2 3
FirstName John Erina Jane
I hope this can be solved without using cursors and temp tables, but maybe that's the way to go?
EDIT:
Forgot to mention, I'm using sqlserver (mssql)
EDIT2:
I'm not all that good at explaining, so here is some more code to do that job for me.
This will add another column to Worker table, and a query to show the desired result. It's the query that has to be "smarter" so it can handle future added tables and columns added. (again, this is a proof of concept. The database has > 200 tables and > 1000 columns)
--Add a column
alter table Worker add LastName nvarchar(max);
--Add some data
update Worker set LastName = 'Smith' where Id = 1;
update Worker set LastName = 'Smith' where Id = 2;
update Worker set LastName = 'Smith' where Id = 3;
--Query to give desired output (top 100, but only 3 rows in this table)
select 'FirstName' as 'Column',* from (select top 100
ROW_NUMBER() over (order by Id) as IdRows, FirstName from worker) as st
pivot
(
max(FirstName) for IdRows in ([1],[2],[3])
) as pt
union
select 'LastName' as 'Column',* from (select top 100
ROW_NUMBER() over (order by Id) as IdRows, LastName from worker) as st
pivot
(
max(LastName) for IdRows in ([1],[2],[3])
) as pt
To solve this, I used temp table, and put it into a loop. Not a good solution, but it works. Had to cast all the data to nvarchar to make it work.
I have the following master table called Master and sample data
ID---------------Date
1 2014-09-07
2 2014-09-07
3 2014-09-08
The following details table called Details
masterId-------------Name
1 John Walsh
1 John Jones
2 John Carney
1 Peter Lewis
3 John Wilson
Now I want to find out the count of Master records (grouped on the Date column) whose corresponding details record with Name having the value "John".
I cannot figure how to write a single SQL statement for this job.
**Please note that join is needed in order to find master records for count. However, such join creates duplicate master records for count. I need to remove such duplicate records from being counted when grouping on the Date column in the Master table.
The correct results should be:
count: grouped on Date column
2 2014-09-07
1 2014-09-08
**
Thanks and regards!
This answer assumes the following
The Name field is always FirstName LastName
You are looking once and only once for the John firstname. The search criteria would be different, pending what you need
SELECT Date, Count(*)
FROM tblmaster
INNER JOIN tbldetails ON tblmaster.ID=tbldetails.masterId
WHERE NAME LIKE 'John%'
GROUP BY Date, tbldetails.masterId
What we're doing here is using a wilcard character in our string search to say "Look for John where any characters of any length follows".
Also, here is a way to create table variables based on what we're working with
DECLARE #tblmaster as table(
ID int,
[date] datetime
)
DECLARE #tbldetails as table(
masterID int,
name varchar(50)
)
INSERT INTO #tblmaster (ID,[date])
VALUES
(1,'2014-09-07'),(2,'2014-09-07'),(3,'2014-09-08')
INSERT INTO #tbldetails(masterID, name) VALUES
(1,'John Walsh'),
(1,'John Jones'),
(2,'John Carney'),
(1,'Peter Lewis'),
(3,'John Wilson')
Based on all comments below, this SQL statement in it's clunky glory should do the trick.
SELECT date,count(t1.ID) FROM #tblmaster mainTable INNER JOIN
(
SELECT ID, COUNT(*) as countOfAll
FROM #tblmaster t1
INNER JOIN #tbldetails t2 ON t1.ID=t2.masterId
WHERE NAME LIKE 'John%'
GROUP BY id)
as t1 on t1.ID = mainTable.id
GROUP BY mainTable.date
Is this what you want?
select date, count(distinct m.id)
from master m join
details d
on d.masterid = m.id
where name like '%John%'
group by date;
Tablename: EntryTable
ID CharityName Title VoteCount
1 save the childrens save them 1
2 save the childrens saving childrens 3
3 cancer research support them 10
Tablename: ContestantTable
ID FirstName LastName EntryId
1 Neville Vyland 1
2 Abhishek Shukla 1
3 Raghu Nandan 2
Desired output
CharityName FullName
save the childrens Neville Vyland
Abhishek Shukla
cancer research Raghu Nandan
I tried
select LOWER(ET.CharityName) AS CharityName,COUNT(CT.FirstName) AS Total_No_Of_Contestant
from EntryTable ET
join ContestantTable CT
on ET.ID = CT.ID
group by LOWER(ET.CharityName)
Please advice.
Please have a look at this sqlfiddle.
Have a try with this query:
SELECT
e.CharityName,
c.FirstName,
c.LastName,
sq.my_count
FROM
EntryTable e
INNER JOIN ContestantTable c ON e.ID = c.EntryId
INNER JOIN (
SELECT EntryId, COUNT(*) AS my_count FROM ContestantTable GROUP BY EntryId
) sq ON e.ID = sq.EntryId
I assumed you actually wanted to join with ContestantTable's EntryId column. It made more sense to me. Either way (joining my way or yours) your sample data is faulty.
Apart from that, you didn't want repeating CharityNames. That's not the job of SQL. The database is just there to store and retrieve the data. Not to format it nicely. You want to work with the data on application layer anyways. Removing repeating data doesn't make this job easier, it makes it worse.
Most people do not realize that T-SQL has some cool ranking functions that can be used with grouping. Many things like reports can be done in T-SQL.
The first part of the code below creates two local temporary tables and loads them with data for testing.
The second part of the code creates the report. I use two common table expressions (CTE). I could have used two more local temporary tables or table variables. It really does not matter with this toy example.
The cte_RankData has two columns RowNum and RankNum. If RowNum = RankNum, we are on the first instance of charity. Print out the charity name and the total number of votes. Otherwise, print out blanks.
The name of the contestant and votes for that contestant are show on the detail lines. This is a typical report with sub totals show at the top.
I think this matches the report output that you wanted. I ordered the contestants by most votes descending.
Sincerely
John Miner
www.craftydba.com
--
-- Create the tables
--
-- Remove the tables
drop table #tbl_Entry;
drop table #tbl_Contestants;
-- The entries table
Create table #tbl_Entry
(
ID int,
CharityName varchar(25),
Title varchar(25),
VoteCount int
);
-- Add data
Insert Into #tbl_Entry values
(1, 'save the childrens', 'save them', 1),
(2, 'save the childrens', 'saving childrens', 3),
(3, 'cancer research', 'support them', 10)
-- The contestants table
Create table #tbl_Contestants
(
ID int,
FirstName varchar(25),
LastName varchar(25),
EntryId int
);
-- Add data
Insert Into #tbl_Contestants values
(1, 'Neville', 'Vyland', 1),
(2, 'Abhishek', 'Shukla', 1),
(3, 'Raghu', 'Nandan', 2);
--
-- Create the report
--
;
with cte_RankData
as
(
select
ROW_NUMBER() OVER (ORDER BY E.CharityName ASC, VoteCount Desc) as RowNum,
RANK() OVER (ORDER BY E.CharityName ASC) AS RankNum,
E.CharityName as CharityName,
C.FirstName + ' ' + C.LastName as FullName,
E.VoteCount
from #tbl_Entry E inner join #tbl_Contestants C on E.ID = C.ID
),
cte_SumData
as
(
select
E.CharityName,
sum(E.VoteCount) as TotalCount
from #tbl_Entry E
group by E.CharityName
)
select
case when RowNum = RankNum then
R.CharityName
else
''
end as rpt_CharityName,
case when RowNum = RankNum then
str(S.TotalCount, 5, 0)
else
''
end as rpt_TotalVotes,
FullName as rpt_ContestantName,
VoteCount as rpt_Votes4Contestant
from cte_RankData R join cte_SumData S
on R.CharityName = S.CharityName
I have one table with gender as one of the columns.
In gender column only M or F are allowed.
Now i want to sort the table so that while displaying the table in gender field M and F will come alternetivly.
I have Tried....
I have tried to create one(new) table with the same structure as my existing table.
Now using high leval insert i want to insert M to odd rows and F to even rows.
After that i want to join those two statements using union operator.
I am able to insert to ( new ) the table only male or female but not to the even or odd rows...
Can any body help me regarding this....
Thanks in Advance....
Don't consider a table to be "sorted". The SQL server may return the rows in any order depending on execution plan, index, joins etc. If you want a strict order you need to have an ordered column, like an identity column. Usually it is better to apply the desired sorting when selecting data.
However the interleaving of M and F is a little bit tricky, you need to use the ROW_NUMBER function.
Valid SQL Server code:
CREATE TABLE #GenderTable(
[Name] [nchar](10) NOT NULL,
[Gender] [char](1) NOT NULL
)
-- Create sample data
insert into #GenderTable (Name, Gender) values
('Adam', 'M'),
('Ben', 'M'),
('Casesar', 'M'),
('Alice', 'F'),
('Beatrice', 'F'),
('Cecilia', 'F')
SELECT * FROM #GenderTable
SELECT * FROM #GenderTable
order by ROW_NUMBER() over (partition by gender order by name), Gender
DROP TABLE #GenderTable
This gives the output
Name Gender
Adam M
Ben M
Casesar M
Alice F
Beatrice F
Cecilia F
and
Name Gender
Alice F
Adam M
Beatrice F
Ben M
Cecilia F
Casesar M
If you use another DBMS the syntax may differ.
I think the best way to do it would be to have two queries (one for M, one for F) and then join them together. The catch would be you would have to calculate the "rank" of each query and then sort accordingly.
Something like the following should do what you need:
select * from
(select
#rownum:=#rownum+1 rank,
t.*
from people_table t,
(SELECT #rownum:=0) r
where t.gender = 'M'
union
select
#rownum:=#rownum+1 rank,
t.*
from people_table t,
(SELECT #rownum:=0) r
where t.gender = 'F') joined
order by joined.rank, joined.gender;
If you are using SQL Server, you can seed your two tables with an IDENTITY column as follows. Make one odd and one even and then union and sort by this column.
Note that you can only truly alternate if there are the same number of male and female records. If there are more of one than the other, you will end up with non-alternating rows at the end.
CREATE TABLE MaleTable(Id INT IDENTITY(1,2) NOT NULL, Gender CHAR(1) NOT NULL)
INSERT INTO MaleTable(Gender) SELECT 'M'
INSERT INTO MaleTable(Gender) SELECT 'M'
INSERT INTO MaleTable(Gender) SELECT 'M'
CREATE TABLE FemaleTable(Id INT IDENTITY(2,2) NOT NULL, Gender CHAR(1) NOT NULL)
INSERT INTO FemaleTable(Gender) SELECT 'F'
INSERT INTO FemaleTable(Gender) SELECT 'F'
INSERT INTO FemaleTable(Gender) SELECT 'F'
SELECT u.Id
,u.Gender
FROM (
SELECT Id, Gender
FROM FemaleTable
UNION
SELECT Id, Gender
FROM MaleTable
) u
ORDER BY u.Id ASC
See here for a working example
What would be the best way to model 1 table with multiple 1 to many relatiionships.
With the above schema if Report contains 1 row, Grant 2 rows and Donation 12. When I join the three together I end up with a Cartesian product and result set of 24. Report joins to Grant and creates 2 rows, then Donation joins on that to make 24 rows.
Is there a better way to model this to avoid the caresian product?
example code
DECLARE #Report
TABLE (
ReportID INT,
Name VARCHAR(50)
)
INSERT
INTO #Report
(
ReportID,
Name
)
SELECT 1,'Report1'
DECLARE #Grant
TABLE (
GrantID INT IDENTITY(1,1) PRIMARY KEY(GrantID),
GrantMaker VARCHAR(50),
Amount DECIMAL(10,2),
ReportID INT
)
INSERT
INTO #Grant
(
GrantMaker,
Amount,
ReportID
)
SELECT 'Grantmaker1',10,1
UNION ALL
SELECT 'Grantmaker2',999,1
DECLARE #Donation
TABLE (
DonationID INT IDENTITY(1,1) PRIMARY KEY(DonationID),
DonationMaker VARCHAR(50),
Amount DECIMAL(10,2),
ReportID INT
)
INSERT
INTO #Donation
(
DonationMaker,
Amount,
ReportID
)
SELECT 'Grantmaker1',10,1
UNION ALL
SELECT 'Grantmaker2',3434,1
UNION ALL
SELECT 'Grantmaker3',45645,1
UNION ALL
SELECT 'Grantmaker4',3,1
UNION ALL
SELECT 'Grantmaker5',34,1
UNION ALL
SELECT 'Grantmaker6',23,1
UNION ALL
SELECT 'Grantmaker7',67,1
UNION ALL
SELECT 'Grantmaker8',78,1
UNION ALL
SELECT 'Grantmaker9',98,1
UNION ALL
SELECT 'Grantmaker10',43,1
UNION ALL
SELECT 'Grantmaker11',107,1
UNION ALL
SELECT 'Grantmaker12',111,1
SELECT *
FROM #Report r
INNER JOIN
#Grant g
ON r.ReportID = g.ReportID
INNER JOIN
#Donation d
ON r.ReportID = d.ReportID
Update 1 2011-03-07 15:20
Cheers for the feedback so far, to add to this scenario there are also 15 other 1 to many relationships coming from the one report table. These tables can't for various business reasons be grouped together.
Is there any relationship at all between Grants and Donations? If there isn't, does it make sense to pull back a query that shows a pseudo relationship between them?
I'd do one query for grants:
SELECT r.*, g.*
FROM #Report r
JOIN #Grant g ON r.ReportID = g.ReportID
And another for donations:
SELECT r.*, d.*
FROM #Report r
JOIN #Donation d ON r.ReportID = d.ReportID
Then let your application show the appropriate data.
However, if Grants and Donations are similar, then just make a more generic table such as Contributions.
Contributions
-------------
ContributionID (PK)
Maker
Amount
Type
ReportID (FK)
Now your query is:
SELECT r.*, c.*
FROM #Report r
JOIN #Contribution c ON r.ReportID = c.ReportID
WHERE c.Type = 'Grant' -- or Donation, depending on the application
If you're going to join on ReportID, then no, you can't avoid a lot of rows. When you omit the table "Report", and just join "Donation" to "Grant" on ReportId, you still get 24 rows.
SELECT *
FROM Grant g
INNER JOIN
Donation d
ON g.ReportID = d.ReportID
But the essential point is that it doesn't make sense in the real world to match up donations and grants. They're completely independent things that essentially have nothing to do with each other.
In the database, the statement immediately above will join each row in Grants to every matching row in Donation. The resulting 24 rows really shouldn't surprise you.
When you need to present independent things to the user, you should use a report writer or web application (for example) that selects the independent things, well, independently. Select donations and put them into one section of a report or web page, then select grants and put them into another section of the report or web page, and so on.
If the table "Report" is supposed to help you record which sections go into a particular report, then you need a structure more like this:
create table reports (
reportid integer primary key,
report_name varchar(35) not null unique
);
create table report_sections (
reportid integer not null references reports (reportid),
section_name varchar(35), -- Might want to reference a table of section names
section_order integer not null,
primary key (reportid, section_name)
);
The donation and grant tables look almost identical. You could make them one table and add a column that is something like DonationType. Would reduce complexity by 1 table. Now if donations and grants are completely different and have different subtables associated with them then keeping them seperate and only joining on one at a time would be ideal.