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Huge performance difference between two similar SQL queries

I have two SQL queries that provides the same output. My first intuition was to use this: Now, this took something like 70 secs to complete! Searching for another solution I tried something similar: Surprisingly, this took 0.05 secs to complete!!! how come these two are so different? thanks! Answer First thin…

Escape single quote in sql query c#

Here I have this method in my CandidateOp class file. I’m passing the ComboBox text in the form and I am getting the ID to the integer type variable tempPrID. The partyIDtoInsert, is a stored procedure I have created and it is being called in the method getpartyID as shown before, to get the id of unite…

PHP fails to insert into Mysql (auto increment)

I have made my Mysql Table link this: That problem occurs because i am not able to insert auto_increment into my mysql query. index.php I post to it by a HTML form and it does executes the query but i get no rows in that table. I thnk its because of auto_increment or Unique or Primary. i was told to

making clickable text from php script

I have a php script below <?php include 'db_connector.php'; $result = mysqli_query($con,"SELECT operation FROM contract"); while($row = mysqli_fetch_array($result)) { echo $row['operation'…

Can you delete data from influxdb?

How do you delete data from influxdb? The documentation shows it should be as simple as: delete from foo where time < now() -1h For some reason, influxdb rejects my delete statements saying "…

Just get column names from hive table

I know that you can get column names from a table via the following trick in hive: hive> set hive.cli.print.header=true; hive> select * from tablename; Is it also possible to just get the …