Oracle Update | Update - oracle tutorial - sql tutorial




Oracle update

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What is Oracle UPDATE ?

  • The Oracle UPDATE statement is used to update existing records in a table in an Oracle database
 oracle update

Syntax

UPDATE table_name  SET column1 = expression1, column2 = expression2, ... column_n = expression_n WHERE conditions;
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Parameters or Arguments:

column1, column2, ... column_n

  • The columns that you wish to update.

expression1, expression2, ... expression_n

  • The new values to assign to the column1, column2, ... column_n. So column1 would be assigned the value of expression1,column2 would be assigned the value of expression2, and so on.

WHERE conditions

  • Optional. The conditions that must be met for the update to execute. If no conditions are provided, then all records in the table will be updated
Oracle update data into the  table

SQL Update Table

Example:

UPDATE wikitechy_emp SET Name = 'Dharma' WHERE Id=5;
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Screenshot:

 oracle update select output
  1. Here you can see the table wikitechy_emp whose Name value hasn’t changed for the Id=5.
 oracle update query
  1. Here we have Updated the name value as ‘Dharma’ instead of ‘Indhu’ by using the “Where Condition” in which it has changed the name value for the ID=5 using UPDATE Statement.
  2. Click Run button to execute the query.
  3. We can see the rows which has been successfully updated in the wikitech_emp table.
 update-output
  1. After the execution of the Update Query statement, the Name value has been changed as ‘Dharma’ whose Id=5.

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