How do you spool a SQL query?

Using the Oracle spool command

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

How do you run a spool command?

— Turn on the spool spool c:sers\ggould\spool_file. txt — Run your Query select * from dba_tables; — Turn of spooling spool off; The SPOOL command is used to echo the output to a text file. Spooling output to a file is a good thing to do whenever you run a script, or any other command that produces a large output.

What is spool in database?

Spooling is a process in which data is temporarily held to be used and executed by a device, program or the system. Data is sent to and stored in memory or other volatile storage until the program or computer requests it for execution. “Spool” is technically an acronym for simultaneous peripheral operations online.

How do I start the spool in SQL Plus?

In iSQL*Plus, use the preference settings to direct output to a file. Represents the name of the file to which you wish to spool. SPOOL followed by file_name begins spooling displayed output to the named file. If you do not specify an extension, SPOOL uses a default extension (LST or LIS on most systems).

What is spooling in SQL server?

Te SQL Server Eager Spool operator is used to take all the records passed to it from another operator, read all the data at one time, blocking any access to the data during that one shot read and store it in a temp table in the tempdb database.

How do I spool in mysql?

For the Oracle SQLPlus spool command, there is no equivalent in the mysql command line client. To get output from the mysql command line client saved to a file, you can have the operating system redirect the output to a file, rather than to the display. In Unix, you use the > symbol on the command line.

Can we use spool in procedure?

Answers. Spool is a SQL Plus feature. You can’t use it within PL/SQL code. If you want to execute a procedure and have something written to a file, use UTL_FILE.

What is spooling explain with example?

The biggest example of Spooling is printing. The documents which are to be printed are stored in the SPOOL and then added to the queue for printing. During this time, many processes can perform their operations and use the CPU without waiting while the printer executes the printing process on the documents one-by-one.

What is spool in SQL server?

A spool is basically a temporary table created within the execution of the query that is used when it’s likely that data will be needed again, and again during the execution of the query.

What is spool operator?

The spool operator creates a temporary data storage in tempdb that exists only for the duration of the current statement. This storage is populated with a subset of data that the server needs to access more than once. The idea is to make the query more efficient by “caching” the data.

What is lazy spool in SQL Server?

SQL Server Table Spool Operator (Lazy Spool) Te SQL Server Lazy Spool is used to build a temporary table on the TempDB and fill it in lazy manner. In other words, it fills the table by reading and storing the data only when individual rows are required by the parent operator.

What is spool in MySQL?

SPOOL COMMAND in MySQL -> tee/notee Tee followed by a filename turns on MySQL logging to a specified file. It can be stopped by command notee. E.g. tee /home/testdata.txt.

How do I write SQL output to a file?

Getting Started

  1. If you want to save the results in a txt file, you can do this in SSMS. Go to Tools>Options:
  2. Select the option Result to file:
  3. Create a query and execute the query.
  4. The result saved are the following:
  5. SQLCMD.
  6. PowerShell.
  7. Import/Export Wizard in SSMS.
  8. You will open the SQL Server Import and Export wizard:

How do I create a CSV file in Oracle SQL query?

How to Export Query Results to CSV in SQL Developer

  1. Step 1: Run your query. Firstly, you’ll need to run your query in SQL Developer.
  2. Step 2: Open the Export Wizard.
  3. Step 3: Select the CSV format and the location to export your file.
  4. Step 4: Export query results to CSV.

Where is spool file in Oracle?

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. lst , and if you have it set up can use something like spool \\\\test.

How spooling is done?

Spooling works like a typical request queue where data, instructions and processes from multiple sources are accumulated for execution later on. Generally, it is maintained on computer’s physical memory, buffers or the I/O device-specific interrupts.

Why is spooling necessary?

Spooling is useful because devices access data at different rates. The spool buffer provides a waiting station where data can rest while a slower device, such as a printer, catches up. When the slower device is ready to handle a new job, it can read another batch of information from the spool buffer.

What is SQL table spool?

The Table Spool operator is one of the four spool operators that SQL Server supports. It retains a copy of all data it reads in a worktable (in tempdb) and can then later return extra copies of these rows without having to call its child operators to produce them again.

What is spool in SQL Server?

What is spooling in SQL Server?