I need sql query to display row numbers in table. I am working in Mainframes and we use SQL queries to connect to oracle tables . I need a query to display row numbers in a table , table doesnt have a column for row numbers . In Mainframes we can input sql queries alone . Any help will be greatly appreciated!!
You can use ROWNUM Pseudocolumn.
Example
SELECT ROWNUM,a.* FROM employees a;
Related
I have a problem in Power BI with DAX, i want to do SQL joins in Dax , i made my data modelling with my tree tables
Table 1
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table 2
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table 3
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I want to do with DAX this table joining in this SQL query
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I want to create a table with the joining bloc
Can you help me ?
Kind Regards ;
I try to do it on power query but i have some speed issue
In power bi, you would address this by creating relationships in the model:
https://learn.microsoft.com/en-us/power-bi/transform-model/desktop-create-and-manage-relationships
Please note that all joins are equivalent to outer joins in SQL. Some of what is in your ssample query is not valid SQL syntax - you can't have duplicate table names, "join" is repeated. However, if you wish to filter a table like T3.U2 = 'NW', you can simply add that as a WHERE clause in the query to import the data into the model or filter out the rows you want with PowerQuery (using the edit queries dialogue in power bi).
I have a table test with looks like the following
That should be transformed to the following table
I can achieve that with the following crosstab statement
SELECT *
FROM crosstab( 'select category, month, sum from test) AS ct(category text, r202208 float, r202209 float);
However this only works when I know the columns beforehand, but the table contains how much money I spend in each category and each month, so I don't know the months upfront. Is it possible to autogenerate the the columns based on the content in the month column of the original table, maybe by using a postgres function?
Of course I could generate the sql query dynamically as string and execute it with java, node or something else. However I get the data as csv from my financial institute and the original table is just a view, so I would like to create that table without the help of external programming
For data profiling purpose , I just need to get the idea if a columns in a given table has values populated or not. For that, I need to get the list of columns and distinct value counts for a given db2 table.
If you are using Db2 for Linux, Unix or Windows you could try
SELECT TABSCHEMA, TABNAME, COLNAME, COLCARD FROM SYSCAT.COLUMNS
I am trying to create a query that will read all rows in table 1 and show them concatenated as if they are one word.
I tried different solutions with no luck.
Imagine a table (CUSTOMER) contains 3 rows (CUST1, CUST2, CUST3)
I want the result of a select statement to give me(CUST1CUST2CUST3) as one row
Notes: I cant use procedures, and if possible the statement should be in PostgreSQL please.
Thanks,
You can use string_agg function to concat rows in postgresql as follow :
SELECT id, string_agg(employee, '')
FROM CUSTOMER
GROUP BY id;
I am trying to fetch the last row of my sqlite3 db.
can anybody tell me the query syntax.
SELECT field
FROM TABLE
ORDER BY field DESC
LIMIT 1
assuming that ordering by DESC puts your last row first