What Is Spooling In Database?

How do I get my printer to stop spooling?

Click the Start button and select Run.

Type Command and then click OK to display the Command Prompt.

In the Command Prompt type, net stop spooler, then press Enter to Stop the Print Spooler.

In the Command Prompt type, net start spooler, then press Enter to Start the Print Spooler..

Where are Oracle spools stored?

2 Answers. Spool is a client activity, not a server one; the . lst file will be created on the machine that SQL Developer is on, not the server where the database it’s connecting to resides. You can spool to a specific directory, e.g. spool c:\windows\temp\test.

How many tables can you join in SQL?

Theoretically, there is no upper limit on the number of tables that can be joined using a SELECT statement. (One join condition always combines two tables!) However, the Database Engine has an implementation restriction: the maximum number of tables that can be joined in a SELECT statement is 64.

Can we join 3 tables in SQL?

As you can see, joining three tables in SQL isn’t as hard as it sounds. In fact, you can join as many tables as you like – the idea behind it is the same as joining only two tables. It’s very helpful to take a look at the data midstep and imagine that the tables you’ve already joined are one table.

What is spooling in SQL?

The “spool” command is used within SQL*Plus to direct the output of any query to a server-side flat file. SQL> spool /tmp/myfile.lst. Becuse the spool command interfaces with the OS layer, the spool command is commonly used within Oracle shell scripts.

How do you fix spooling?

To solve this error, try the following steps.Press “Window key” + “R” to open the Run dialog.Type “services. msc“, then select “OK“.Double-click the “Printer Spooler” service, and then change the startup type to “Automatic“. … Restart the computer and try to install the printer again.

What is meant by spooling?

In computing, spooling is a specialized form of multi-programming for the purpose of copying data between different devices. In contemporary systems, it is usually used for mediating between a computer application and a slow peripheral, such as a printer. … Spooling is a combination of buffering and queueing.

How can I join two tables?

The simplest Join is INNER JOIN.INNER JOIN: The INNER JOIN keyword selects all rows from both the tables as long as the condition satisfies. … LEFT JOIN: This join returns all the rows of the table on the left side of the join and matching rows for the table on the right side of join.More items…•

Can we Inner join three tables?

To join the three tables, you place the second INNER JOIN clause after the first INNER JOIN clause as the following query: SELECT c. customer_id, c.

Why set Serveroutput on is used?

Basically the use of SET SERVEROUTPUT is to display the query answer in SQL *PLUS interface… When you use the DBMS_OUTPUT. PUT_LINE procedure, the procedure will write the passing string into the Oracle buffer. … Use the “Set serveroutput on” to display the buffer used by dbms_output.

What is Dbms_output Put_line?

The Oracle dbms_output. put_line procedure allows you to write data to flat file or to direct your PL/SQL output to a screen.

What does spooling mean in printing?

Printer spooling enables you to send large document files or a series of them to a printer, without needing to wait until the current task is finished. Think of it as a buffer or cache. It’s a place that your documents can “line up” and get ready to be printed after a previous printing task is completed.

Why is my printer stuck spooling?

Sometimes problems with printing stuck on spooling can occur due to your drivers, and one way to fix that problem is to reinstall your printer driver. To do that, follow these steps: Press Windows Key + X and select Device Manager from the list. When Device Manager opens, locate your printer.

How do I save a spool in Oracle?

Export Query Results to a Text File using Spool spool ‘Path where you’d like to store the exported file\your_file_name. txt’; SELECT * FROM schema. table WHERE condition; spool off; And as before, don’t forget to press F5 in order to run the Spool and then generate the file at your specified path.

Can we execute queries parallely from different session?

No, you will need a separate session per query. @Tony is correct, each query must run in it’s own session to run in parallel.

What is SQL Rowcount?

%ROWCOUNT yields the number of rows affected by an INSERT , UPDATE , or DELETE statement, or returned by a SELECT INTO statement. … The value of the SQL%ROWCOUNT attribute refers to the most recently executed SQL statement from PL/SQL.

How do I set up Serveroutput?

SET SERVEROUTPUT commandAuthorization. EXECUTE privilege on the DBMS_OUTPUT module.Required connection. Database.Command syntax. SET SERVEROUTPUT OFF ON.Command parameters. ON. … Usage notes. Messages are added to the DBMS_OUTPUT message buffer by the PUT, PUT_LINE, and NEW_LINE procedures.

Where are spool files stored?

Navigate to %SystemRoot%\System32\spool\PRINTERS, on most systems this will be the path C:\Windows\System32\spool\PRINTERS. Delete all flies in this directory.