I have a column with multiple employee id's with comma separation. Need to retrieve data with select query with where condition of that employee id's column but need to pass one id at a time. In the below employee id column have multiple id's.
SELECT lt.*
FROM leave as lt
WHERE true
and employee_id IN ($employee_id)
So, try something like this:
SELECT * FROM ... WHERE id = ANY (string_to_array(ids, ',')::integer[])
Related
I have a table with 60 columns in it. I would like to identify how many duplicates there are in the table based on all the columns being identical.
I don't want to have to type out every field name in the SELECT or GROUP BY clauses. Is there a way to do that?
You can use an approach like this for each table:
SELECT
MD5(OBJECT_CONSTRUCT(SRC.*)::VARCHAR) DUP_MD5, SUM(1) AS TOTAL_COUNT
FROM <table> SRC
GROUP BY 1
HAVING SUM(1) > 1;
I have a table with some identifiers that repeat themselves like
id
-------
djkfgh
kdfjhw
efkujh
dfsggs
djkfgh
djkfgh
efkujh
I also have a list of id's of interest, say ["djkfgh","dfsggs"]. I would like to count only those values that appear in the list, rather than all the distinct values of the column.
Select count(id) from table where id IN(subset);
I want to return all the rows from a table which are unique. I.e. if a certain field in two rows contain the same name, that name shouldn't be shown.
Since you want only the uniques names (and not an unique row for every names like you could have with DISTINCT), you have to use a GROUP BY and a HAVING (instead of a WHERE, because your parameter is the result of a function, not a variable) :
SELECT name FROM myTable GROUP BY name HAVING COUNT(name) = 1
SELECT DISTINCT column_name FROM table
If you want the complete rows, then use row_number() or distinct on:
select distinct on (name) t.*
from table t
order by name;
Following query works but i want with 2 fields
CREATE TABLE TOTAPPS (ANUM) AS SELECT a.A# FROM APPLICANT a.
This is work that
//TOTAPPS
ANUM
--------
if i want to create with 2 fields?
//Totapps
ANUM NUMBER
---------------------------
how should i create the table? in order to get the correct out?
and the NUMBER is refer to the ANUM , for example
CREATE TABLE TOTAPPS (ANUM) AS SELECT a.A# FROM APPLICANT a,
(NUMBER) AS SELECT COUNT(*) FROM a.A#;
but it's failed to work.
Calling a column NUMBER is not correct as it is a reserved word. Assuming from your second query that you want to add to your table distinct values of a.A# and the count of these values in the table, you should try this:
CREATE TABLE TOTAPPS (ANUM, MYNUMBER) AS
SELECT a.A#, COUNT(a.A#) FROM APPLICANT a GROUP BY a.A#;
I'm wanting to retrieve all rows and columns which contain the MAX value in one column.
For example: 3 columns - ID (not unique), name, age
I'm wanting all rows and columns which contain the max value in age.
Thanks
SELECT * FROM table WHERE age = (SELECT MAX(age) FROM table)
Select * from table where value=max(value)
Maybe you need to exchange where with having