What is Save command in SQL?

Saves the contents of the SQL buffer in an operating system script. In iSQL*Plus, click the Save Script button to save the Input area contents to a script. … Specifies the script in which you wish to save the buffer’s contents. CREATE. Creates a new file with the name specified.

How do I save in SQL Plus?

SQLPLUS saving to file

  1. At the SQL> prompt, type Save test. sql (or save test. …
  2. At the SQL> prompt, type spool output. txt then enter ; then type any SQL commands; when finished type ‘spool off’; the commands and results will be saved to file output.

What are the 5 basic SQL commands?

There are five types of SQL commands: DDL, DML, DCL, TCL, and DQL.

  • Data Definition Language (DDL) DDL changes the structure of the table like creating a table, deleting a table, altering a table, etc. …
  • Data Manipulation Language. …
  • Data Control Language. …
  • Transaction Control Language. …
  • Data Query Language.

What is a command in SQL?

SQL commands are instructions, coded into SQL statements, which are used to communicate with the database to perform specific tasks, work, functions and queries with data. … Data Definition Language (DDL) – These SQL commands are used for creating, modifying, and dropping the structure of database objects.

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How do you write commands in SQL?

Some of the rules for formatting a query are given below:

  1. Put each statement in the query in a new line.
  2. Put SQL keywords in the query in uppercase.
  3. Use CamelCase capitalization in the query and avoid underscore(Write ProductName and not Product_Name).

How do I save a table in mysql?

Export

  1. Connect to your database using phpMyAdmin.
  2. From the left-side, select your database.
  3. Click the Export tab at the top of the panel.
  4. Select the Custom option.
  5. You can select the file format for your database. …
  6. Click Select All in the Export box to choose to export all tables.

What is spool 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.

What is DBMS command?

SQL commands are the instructions used to communicate with a database to perform tasks, functions, and queries with data. SQL commands can be used to search the database and to do other functions like creating tables, adding data to tables, modifying data, and dropping tables.

What does PK mean in database?

A primary key, also called a primary keyword, is a key in a relational database that is unique for each record. It is a unique identifier, such as a driver license number, telephone number (including area code), or vehicle identification number (VIN). A relational database must always have one and only one primary key.

What is Rdbms?

The software used to store, manage, query, and retrieve data stored in a relational database is called a relational database management system (RDBMS). The RDBMS provides an interface between users and applications and the database, as well as administrative functions for managing data storage, access, and performance.

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What are the 4 major commands in SQL?

There are four basic SQL Operations or SQL Statements.

  • SELECT – This statement selects data from database tables.
  • UPDATE – This statement updates existing data into database tables.
  • INSERT – This statement inserts new data into database tables.
  • DELETE – This statement deletes existing data from database tables.

How do I save a SQL query as a table?

Exporting query results to a database

  1. To open the Export Query Results wizard, select File > Export. …
  2. Select Database. …
  3. From the Source list, select the query result set that you want to export. …
  4. Specify the database where you want to save the query results data in the Database field.

How do I save a SQL query result in a text 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:

What is trigger in SQL?

A SQL trigger is a database object which fires when an event occurs in a database. We can execute a SQL query that will “do something” in a database when a change occurs on a database table such as a record is inserted or updated or deleted. For example, a trigger can be set on a record insert in a database table.

What are the SQL data types?

Data types in SQL Server are organized into the following categories:

  • Exact numerics. Unicode character strings.
  • Approximate numerics. Binary strings.
  • Date and time. Other data types.
  • Character strings.
  • bigint. numeric.
  • bit. smallint.
  • decimal. smallmoney.
  • int. tinyint.
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