I have been trying to get a SQL query (in SQL Server Mngt Studio 2008) written to identify duplicates based on a few columns (not the entire record) in a single table but I am getting results that include records that are not duplicates. What is the best way to write this query?
WITH CTEDUPLICATESALARY AS
(
SELECT SALARY, ROW_NUMBER() OVER (PARTITION BY SALARY ORDER BY SALARY) AS ROWNUMBER FROM EmployeeSalary
)
SELECT * FROM CTEDUPLICATESALARY
WHERE CTEDUPLICATESALARY.ROWNUMBER>1
Hope this will help.
Related
The below crashes my DB Browser. Essentially I am trying to sum sales ("sales") by a sales person ("name") that occurred between two dates ("beg_period" and "end_period") pulled from a separate table.
SELECT ta.name, ta.beg_period, ta.end_period,
(SELECT SUM(tb.sales)
FROM sales_log tb
WHERE ta.name = tb.name
AND tb.date BETWEEN ta.beg_period AND ta.end_period
)
FROM performance ta
;
The nested query can be re-written as a single query with a standard join.
SELECT ta.name, ta.beg_period, ta.end_period, SUM(tb.sales)
FROM performance ta INNER JOIN sales_log tb
ON ta.name = tb.name
WHERE tb.date BETWEEN ta.beg_period AND ta.end_period
GROUP BY ta.name, ta.beg_period, ta.end_period;
My guess is that the original query was okay (however inefficient), but DB Browser just didn't know how to interpret the subquery for whatever parsing it attempts, etc. In other words, just because it crashed DB Browser doesn't mean that it would crash sqlite library. Try another sqlite database manager.
I know this isn't a specific bit of code or problem, but I am having trouble with a very similar issue to the person asking this (except theirs is for SQL Server): Combining INSERT INTO and WITH/CTE ...and I can't seem to find it out there on any SAP HANA help forums etc. so thought there may be an expert on here who can just give me a simple yes or no answer.
The SQL statement I am using contains multiple CTEs, but when I try to insert it tells me there is a Syntax error around the word INSERT. It is definitely laid out exactly the same as in the question I've linked above (spent hours checking), and I can post code samples if necessary but I simply want to know whether it is supported first! Thanks
Short answer:
No, CTEs are not supported for INSERT/UPDATE statements.
Longer answer:
SQLScript's INSERT/UPDATE commands are actually "borrowed" SQL commands as the documentation explains.
Checking the documentation for SQL INSERT we find that it supports a subquery as a source of values.
The subquery term is defined as part of the SQL SELECT statement. Checking the documentation for SELECT shows that <subquery> and <with_clause> are different, non-overlapping terms.
This means, that CTEs cannot be used in subqueries and therefore not be part of the subqueries used in INSERT/UPDATE commands.
You can, however, use SQLScript table variables in INSERT statements in your SQLScript blocks, which is very similar to CTEs:
DO BEGIN
te_a := SELECT 10, 'xyz' as VAL from dummy;
te_b := SELECT 20, 'abc' as VAL from dummy;
te_all := SELECT * from :te_a
UNION ALL SELECT * from :te_b;
INSERT INTO VALS
(SELECT * from :te_all);
END;
You can convert the CTE into a Sub-Select statement in many cases
You can use following
insert into city (city, countryid, citycode)
select
city, countryid, citycode
from (
-- CTE Expression as subselect
select * from city
-- end (CTE)
) cte
Instead of using following valid CTE command combined with INSERT (on SQL Server)
with cte as (
select * from city
)
insert into city (city, countryid, citycode)
select
city, countryid, citycode
from cte
SAP HANA includes this posibility, the order of the code is different than SQL Server:
INSERT INTO EXAMPLE (ID)
WITH cte1 AS (SELECT 1 AS ID FROM DUMMY)
SELECT ID FROM cte1;
I'm working with PeopleSoft's query manager and I'm having trouble creating a report that will find all active employees who do not have a certain leave type.
I have the two tables (Employees - Non terminated Employees and Leave_Accrual-EE). They are left outer joined. The field in question is PLAN_TYPE. Now, I've tried creating a filter to pull in all employees who do not have plan type 54. The criteria is B.PLAN_TYPE not equal to 54, but that still brings up everyone, it just doesn't bring up the row for 54.
I feel like I'm missing something obvious - maybe I have to create a subquery? If so, I have never done this in PeopleSoft.
Anyone have any advice?
Original SQL screenshot.
UPDATED
This is less of a PeopleSoft question, and more of a SQL question.
The problem you have been running into is that you are doing a per-row filter and excluding only rows that have the undesirable code.
What you need to do instead is exclude all rows for a user that has the undesirable code in any row.
This can be done with a NOT IN or NOT EXISTS query.
e.g.
SELECT EMPLID
FROM TABLE1
WHERE
EMPLID NOT IN
(
SELECT EMPLID
FROM TABLE1
WHERE CODE = 123
)
/
alternately
SELECT A.EMPLID
FROM TABLE1 A
WHERE
NOT EXISTS
(
SELECT B.EMPLID
FROM TABLE1 B
WHERE
B.CODE = 123
AND B.EMPLID = A.EMPLID
)
/
See this SQL Fiddle example to test out the SQL:
http://sqlfiddle.com/#!4/2b0f6/7
To do this in PS Query, you could do this by adding a criteria with a subquery on the right side of the equivalence.
Here is some documentation:
Home > PeopleSoft PeopleTools 8.53 > PeopleSoft Query > Working with Subqueries
Kindly help me writing below query in openquery.Thanks in advance
INSERT INTO Tablename
SELECT * FROM tablename1 WHERE insertionorderid IN (
SELECT orderid FROM temp_table2)
If you are trying to insert into SQL Server the syntax would be
INSERT INTO dbo.[YOURTABLE] SELECT * FROM [MATCHING_TABLE] WHERE CLAUSE
The caveat here is that the two tables must have identical schemas or you will have to explicitly define the columns. Also this will not work properly for tables with identity columns
In my project, I have a database in SQL which was working fine. But now I have to make the application support oracle db too.
Some limitations I found out was that in Oracle, there is no bit field and the table name cannot be greater than 30 char. Is there any other limitation that I need to keep in mind.
Any suggestion from past experience will be helpful.
If I recall correctly from my earlier Oracle days:
there's no IDENTITY column specification in Oracle (you need to use sequences instead)
you cannot simply return a SELECT (columns) from a stored procedure (you need to use REF CURSOR)
of course, all stored procs/funcs are different (Oracle's PL/SQL is not the same as T-SQL)
The SQL ISNULL counterpart in Oracle is NVL
select ISNULL(col, 0)...
select NVL(col, 0)...
You will also struggle if you attempt to select without a from in Oracle. Use dual:
select 'Hello' from DUAL
Bear in mind also, that in Oracle there is the distinction between PL/SQL (Procedural SQL) and pure SQL. They are two distinct and separate languages, that are commonly combined.
Varchar in Oracle Databases called
varchar2 is limited to 4000
characters
Oracles concept of temporary tables is different, they have a global redefined structure
by default sort order and string compare is case-sensitive
When you add a column to a select *
Select * from table_1 order by id;
you must prefix the * by the table_name or an alias
Select
(row_number() over (order by id)) rn,
t.*
from table_1 t
order by id;
Oracle doesn't distinguish between null and '' (empty string). For insert and update you ca use '', but to query you must use null
create table t1 (
id NUMBER(10),
val varchar2(20)
);
Insert into t1 values (1, '');
Insert into t1 values (2, null);
Select * from t1 where stringval = 0; -- correct but empty
Select * from t1 where stringval is null; -- returns both rows
ORACLE do not support TOP clause. Instead of TOP you can use ROWNUM.
SQL Server: TOP (Transact-SQL)
SELECT TOP 3 * FROM CUSTOMERS
ORACLE: ROWNUM Pseudocolumn
SELECT * FROM CUSTOMERS WHERE ROWNUM <= 3