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Delete Multiple Rows from a Table in Oracle
How To Delete Multiple Rows from a Table in Oracle? You can delete multiple rows from a table in the same way as deleting a single row, except that the WHERE clause will match multiple rows. The tutorial exercise below deletes 3 rows from the fyi_links table: SELECT * FROM fyi_links WHERE id &gt...
2020-01-04, 1824🔥, 0💬

Create a Stored Procedure in Oracle
How To Create a Stored Procedure in Oracle? A stored procedure is a procedure with a specified name and stored into the current database. If you want to create a stored procedure, you can use the CREATE PROCEDURE statement. The example script below creates a stored procedure: SQL&gt; CREATE PROC...
2018-11-11, 1822🔥, 0💬

Create Your Own Reports in SQL Developer in Oracle
How To Create Your Own Reports in SQL Developer in Oracle? Oracle SQL Developer also lets you create your own reports. See the following steps on how to do this: Click menu View. Selects Reports from the menu. Open Reports. Right-click on User Defined Reports. Select Add Report. Enter Name as: My Te...
2019-01-26, 1813🔥, 0💬

What Are Named Parameters in Oracle
What Are Named Parameters in Oracle? Named parameters are actual parameters specified not by position but by providing formal parameter names when calling the procedure or function. The main advantage of named parameters is that the caller don't have to remember the position of each parameter. But t...
2018-10-13, 1812🔥, 0💬

Convert Times to Character Strings in Oracle
How To Convert Times to Character Strings in Oracle? You can convert dates to characters using the TO_CHAR() function as shown in the following examples: SELECT TO_CHAR(SYSDATE, 'HH:MI:SS') FROM DUAL; 04:49:49 SELECT TO_CHAR(SYSDATE, 'HH24:MI:SS.FF') FROM DUAL; -- Error: SYSDATE has no fractional se...
2019-12-02, 1807🔥, 0💬

Define a Sub Function in Oracle
How To Define a Sub Function in Oracle? A sub function is a function defined and used inside another procedure or function. You need to define a sub function in the declaration part of the enclosing procedure or function. Sub function definition starts with the FUNCTION key word. Here is a sample sc...
2018-03-18, 1803🔥, 0💬

Export Data to an XML File in Oracle
How To Export Data to an XML File in Oracle? If you want to export data from a table to a file in XML format, you can use the following steps: Right-click the table name, EMPLOYEES, in the object tree view. Select Export. Select XML. The Export Data window shows up. Click Format tab. Select Format a...
2019-01-12, 1799🔥, 0💬

Variable Names Collide with Column Names in Oracle
What Happens If Variable Names Collide with Table/Column Names in Oracle? When a variable name collides with a column name, PL/SQL will use it as the variable if it is used where variable is allowed; It will be used as the column, if it is used where variable is not allowed but column is allowed. He...
2018-09-24, 1799🔥, 0💬

What Is an Initialization Parameter File in Oracle
What Is an Initialization Parameter File in Oracle? An initialization parameter file is a text file that contains a list of initialization parameters. The file should be written in the client's default character set. Sample initialization parameter files are provided on the Oracle distribution mediu...
2020-07-07, 1798🔥, 0💬

Ways to Start a New Transaction in Oracle
How To Start a New Transaction in Oracle? There is no SQL statement to explicitly start a new transaction. Oracle server implicitly starts a new transaction with the following two conditions: The first executable statement of a new user session will automatically start a new transaction. The first e...
2019-09-16, 1790🔥, 0💬

Introduction to Oracle PL/SQL
Where to find answers to frequently asked questions about Oracle PL/SQL in general? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team about Oracle PL/SQL in general. This FAQ can also be used as learning tutorials on creating procedures, executing proc...
2019-03-27, 1788🔥, 0💬

Scalar Data Types Supported in PL/SQL in Oracle
How Many Scalar Data Types Are Supported in PL/SQL in Oracle? PL/SQL supports many scalar data types divided into 4 groups: Numeric Types: BINARY_DOUBLE, BINARY_FLOAT, BINARY_INTEGER, DEC, DECIMAL, DOUBLE PRECISION, FLOAT, INT, INTEGER, NATURAL, NATURALN, NUMBER, NUMERIC, PLS_INTEGER, POSITIVE, POSI...
2018-11-17, 1785🔥, 0💬

Name Query Output Columns in Oracle
How To Name Query Output Columns in Oracle? Each column in the query output has a default name. If you don't like the default name, you can specify a new name for any column in the query output by using the AS clause. The following statement shows you a good example: SQL&gt; SELECT department_id...
2019-09-27, 1782🔥, 2💬

💬 2019-09-19 Aninda mahadev: Good Tutorial!!!

Use "OUT" Parameters in Oracle
How To Use "OUT" Parameter Properly in Oracle? Here are the rules about OUT parameters: A formal OUT parameter acts like an un-initialized variable. It must be assigned with new values before the end of the procedure or function. An actual OUT parameter must be a variable. An actual OUT parameter wi...
2018-10-19, 1782🔥, 0💬

Retrieve the Count of Updated Rows in Oracle
How To Retrieve the Count of Updated Rows in Oracle? After running an UPDATE statement, the database server returns a count of updated rows. You can retrieve this count from a special predefined variable called SQL%ROWCOUT, as shown in the following tutorial: CREATE TABLE emp_temp AS SELECT * FROM e...
2018-09-13, 1782🔥, 0💬

Use LIKE Conditions in Oracle
How To Use LIKE Conditions in Oracle? LIKE condition is also called pattern patch. There 3 main rules on using LIKE condition: '_' is used in the pattern to match any one character. '%' is used in the pattern to match any zero or more characters. ESCAPE clause is used to provide the escape character...
2020-03-15, 1771🔥, 0💬

Quickest Way to Export Data to a Flat File in Oracle
What Is the Quickest Way to Export a Table to a Flat File in Oracle? The quickest way to export a table to a flat file is probably to use the SQL*Plus SPOOL command. It allows you to record SELECT query result to a text file on the operating system. The following tutorial exercise shows you how cont...
2018-06-27, 1770🔥, 0💬

Create a New Table in Oracle
How To Create a New Table in Oracle? If you want to create a new table in your own schema, you can log into the server with your account, and use the CREATE TABLE statement. The following script shows you how to create a table: &gt;.\bin\sqlplus /nolog SQL&gt; connect HR/fyicenter Connected....
2020-02-29, 1769🔥, 0💬

Start an Oracle Instance in Oracle
How To Start an Oracle Instance in Oracle? This is Step 6. Now you are ready to start the new Oracle Instance without any database. This instance will be used to create a database. Starting an instance without database can be done by using STARTUP NOMOUNT statement as shown below: &gt;.\bin\sqlp...
2018-05-08, 1769🔥, 0💬

Introduction to Oracle SQL Developer
Where to find answers to frequently asked questions on Introduction to Oracle SQL Developer? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Introduction to Oracle SQL Developer: This FAQ can also be used as learning tutorials on SQL statement exe...
2019-02-18, 1765🔥, 0💬

Bring a Tablespace Online in Oracle
How To Bring a Tablespace Online in Oracle? If you have brought a tablespace offline, now you want to make it available to users again, you can use the ALTER TABLESPACE ... ONLINE statement as shown in the following script: SQL&gt; connect HR/fyicenter SQL&gt; CREATE TABLESPACE my_space 2 DA...
2019-01-01, 1765🔥, 0💬

Use SYS Account to Connect to the Server in Oracle
How To Connect to the Server with User Account: SYS in Oracle? SYS is a very special user account. It has been associated with the highest privilege call SYSDBA. Normally, you should not connect to the server with SYS. But if you want to use it, you need to use a special connect command: &gt;cd ...
2019-07-21, 1764🔥, 0💬

How Many Anonymous Blocks Can Be Defined in Oracle
How Many Anonymous Blocks Can Be Defined in Oracle? An anonymous block is stored in the user's current session without any name. So you can only define one anonymous block at any time. If you define another anonymous block, the new block will replace the previously defined block, as shown in the fol...
2018-10-30, 1764🔥, 0💬

Types of PL/SQL Code Blocks in Oracle
What Are the Types PL/SQL Code Blocks in Oracle? There are 3 types of PL/SQL code blocks: Anonymous Block - A block of codes with no name. It may contain a declaration part, an execution part, and exception handlers. Stored Program Unit - A block of codes with a name. It is similar to an anonymous b...
2018-10-30, 1763🔥, 0💬

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