I have an SQLite database which contains three columns: ID, Name, Dept. I have one main ViewController in which I have three fields: enter mobileNumber (a textField), Name (a label), and Dept (a label). When i enter first 4 digit of any number in the textfield, the two labels automatically show the relevant value from the database. i am getting output fine when i give a default value in database. what i need is without giving any default value in database i want to run my app directly when i enter any number it should show the value of Name and Dept to the label. My database contains more than 3000 records.
i am using this query to get data from database:
sqlStatement = [[NSString stringWithFormat:#"SELECT _id,Name,Dept FROM Codes
WHERE _id=\'%#\'",idString.text]UTF8String];
Use LIKE Clause which will return relative outputs.
sqlStatement = [[NSString stringWithFormat:#"SELECT _id,Name,Dept FROM Codes WHERE _id like '%%#'",idString.text]UTF8String];
It will return you matching results as per your id.
For more clarity on LIKE Clause please check this Link.
I Assume
You are running a query with the first 4 digits
In case of more than a single match to the database, you are selecting one of the rows returned by the query
Things to try to debug this:
Debug the query: Programmatically, write a query using 4 digits of a number that returns only one row. Check that the query returns what you expected according to your data source.
Debug displaying information: Hardcode that query and show that you can display the Name and Dept. information.
Related
I developed an app based on App Inventor and Fusion Tables. When I want to update total money by adding some money to already existing money it is giving some error.
When I use SELECT command to get information from fusion table it is taking then number with column Name. When i am trying to add both of them it is giving following error.
Error message
The result from a fusiontable includes always the header row...
from your example SELECT statement the result is
TotalPaid
5000
Obviously to add any value to that result will result in an error, because you only can add numeric values...
You first have to extract the value (in your example 5000) from the result. Convert the result into a list using the split block, just split at \n (new value) to get a list, then select the 2nd item using the select list item block.
Note: to be able to update something in a table, you need the ROWID, see also the SQL Reference Documentation of the Fusion Tables API.
For UPDATE statements the first step to be done is to get the ROWID of the row to be updated with a SELECT statement. The second step is to do the UPDATE.
I am using telegraf-influxdb-grafana together. But I could not get rows for only last timestamp.
Here is what I am doing;
Collecting DB statistics(Running queries at that time) with Telegraf(exec plugin).
Storing output to influxdb
Trying to monitor running queries over grafana
But I need to get all rows at last timestamp.
Here is what I've tried;
> select * from postgresql_running_queries where time=(select max(time) from postgresql_running_queries)
ERR: error parsing query: found SELECT, expected identifier, string, number, bool at line 1, char 54
Here is what I want to see;
Time DB USER STATE QUERY
2017-06-06 14:25.00 mydb myuser active my_query
2017-06-06 14:25.00 mydb myuser idle in transaction my_query2
2017-06-06 14:25.00 mydb2 myuser2 active my_query3
Can any one help me to achive this?
I am open to any solution.
select last(fieldname) from measurment_name;
Query in this format will return last timestamp data from the InfluxDB.
But I am surprised with the fact that you are expecting 3 values for a single timestamp (unless you have different TAG values, refer this documentation how to store duplicate points). You will a ONLY ONE record for a given timestamp. InfluxDB overwrites previous content if there is another entry for same timestamp, here is why.
Your results will be something like (if you don't have different TAG value):
Time DB USER STATE QUERY
2017-06-06 14:25.00 mydb2 myuser2 active my_query3
EDIT:
Based on comment, my guess is you are using TAGs to differentiate, still above query should work, if not, you may try by adding WHERE clause.
I'm using Rails to search through a SQLite table (for other reasons I can't use the standard database-model system) using a SELECT query like so:
info = ActiveRecord::Base.connection.execute("SELECT * FROM #{form_name} WHERE EmailAddress = \"#{user_em}\";")
This returns the correct values, but for some reason the output is in duplicate, the difference being the 2nd set doesn't have column titles in the hash, instead going from 0-[num columns]. For example:
{"id"=>1, "Timestamp"=>"2/27/2017 14:26:03", "EmailAddress"=>"-snip-", 0=>1, 1=>"2/27/2017 14:26:03", 2=>"-snip-"}
(I'll note the obvious- there's only one row in the table with that information in it)
While it's not exactly a fatal problem, I'm interested as to why it's doing so and if it's possible to prevent it. Thanks!
This allows you to read the values both by column index or column name:
id = row[0]
timestamp = row["Timestamp"]
In Qlikview, I have an excel sheet that I use to map USERNAME to a TEAM value. But everytime I refresh the dashboard, new USERNAME values come up and since they are not in the excel sheet, these USERNAME values show up as their own value in the TEAM column. How would I make it so that any USERNAME that is not in the excel sheet shows up as 'Unidentified' or another value under the TEAM column instead of showing up as their own separate value?
First of all when posting question here if possible always include the source code so everybody will have more clear picture about your problem. Just saying.
On the topic ...
Use the mapping load in this case with supplying the third parameter. For example:
TeamMapping:
Mapping
Load
UserName,
Team
From
[User_to_Team_Mapping.xlsx] (ooxml, embedded labels, table is [Sheet1])
;
Transactions:
Load
Id,
Amount,
ApplyMap( 'TeamMapping', User, 'Unidentified') as Team
From
Transactions.qvd (qvd)
;
The third parameter in ApplyMap is the default string value when mapping value was not found in the mapping table (TeamMapping)
I am trying to get answer for the last few weeks. I want to give a textfield to users in the app and ask them to enter a id number and this number will be checked with the uploaded csv file columns. If it matches then display an alert saying that its found a match or else it doesn't.
A csv file is basically a normal file in which items are separated by commas.
For example:
id,name,email
1,Joe,joe#d.com
2,Pat,pat#d.com
To get the list of IDs stored in this csv files, simply loop through the lines, and grab the first item after splitting the string (use comma to split)
id = line.split(",").get(0); // first element ** Note this depends on what language you're using
Now, add this id to a collection of ids you are storing, like in a list.
IDs.add(id);
When you take the user input, all you need to do is to check if the id is in your list of ids.
if (IDs.contains(userId)) { print "Found"; }