I am using the CSVJDBC driver for retrieving results from CSV files. All record fields are interpreted as Strings. How can I utilise the MAX aggregate function in order to obtain the maximim Integer of a column? As far as I know, csvjdbc does not support casting. Consider this sample file: I use the following…
USE % WILD IN WHERE CLAUSE
I have a record in my MySQL database which is a varchar type for e.g I am running a query to fetch this record, say the column name is NAME and table name is DATA. so my query is ……… But this query isn’t fetching any record Tell me any possible way to fetch this particular record throu…
How to count distinct records in Access table and display that value in Excel
I have a table in Access that I’m querying from Excel. I need help with the sql statement. First, I need to filter the table based on SampleType matched criteria indicated in the Where clause. There are only 3 options: “mel”, “col” or “ lun”. The ultimate goal is to pass the number of distinct records from th…
Spring Transient Data Access Resource Exception in jdbcTemplate update
I have a method to detect duplicate entry for a column: (I inject to jdbcTemplate correctly) But i got this exception in runtime: Answer We can use the queryForList() method of jdbcTemplate like this: Where results is a List<String>.
drop trigger if exists and create
I would like to check if the trigger exists on [tbl] and create another one. I tried it this way but didn’t work. What am I doing wrong? Answer The [name] field in sys.objects will contain only the actual name (i.e. trg), not including the schema (i.e. dbo in this case) or any text qualifiers (i.e. [ an…
Can row_number() ignore null in oracle
I have data like this How can i write query to get row_number without counting null column. Answer Well, not specifically. But you can get what you want by using conditional logic: It is not clear to me what the order by is for the row_number() which is what the . . . means.
Return first element in array_agg()
I am writing a query to get all players for all teams. Instead of looping in the application, I decided to get the players of all teams in a single query using array_agg(). I have written the query as follows: This query gives me the result as below, in the result set the teamname is being repeated (exactly t…
Grouping Totals With SQL Query
Here’s the situation: I have a table that has two data columns: And so on… I would like to create a query that presents the totals for the different numbers separately, so it would end up being like so: I’ve tried applying a simple SUM(Value) into my Query, but I can’t seem to get it r…
Recover DB after mirroring
I have this doubt. If i have a SQL 2012 database with a mirrored database and if i stop the mirror… the mirror database will not be accessible, it will be to “In recovery” status. What would happen if i execute: “restore database DB with recovery” Will it become accesible and hav…
Recordset.Edit or Update sql vba statement fastest way to update?
I recently came across vba update statements and I have been using Recordset.Edit and Recordset.Update to not only edit my existing data but to update it. I want to know the difference between the two: recordset.update and Update sql Vba statement. I think they all do the same but I can’t figure which o…