How To Update Values in a Table

Q

How To Update Values in a Table? - Oracle DBA FAQ - Understanding SQL DML Statements

✍: FYIcenter.com

A

If you want to update some values in one row or multiple rows in a table, you can use the UPDATE statement. The script below shows a good example:

UPDATE fyi_links SET counts = 999, notes = 'Good site.' 
  WHERE id = 101;
1 row updated.

SELECT * FROM fyi_links WHERE id = 101;
  ID URL                      NOTES      COUNTS CREATED
---- ------------------------ ---------- ------ ---------
 101 http://dev.fyicenter.com Good site.    999 07-MAY-06

2007-04-21, 5405👍, 0💬

How To Insert Multiple Rows with One INSERT Statement
How To Insert Multiple Rows with One INSERT Statement? - Oracle DBA FAQ - Understanding SQL DML Statements If you want to insert multiple rows with a single INSERT statement, you can use a subquery instead of the VALUES clause. Rows returned from the subquery will be inserted the target table. The f... 2007-04-21, 6065👍, 0💬

How To Update Values on Multiple Rows
How To Update Values on Multiple Rows? - Oracle DBA FAQ - Understanding SQL DML Statements If the WHERE clause in an UPDATE matches multiple rows, the SET clause will be applied to all matched rows. This rule allows you to update values on multiple rows in a single UPDATE statement. Here is a good e... 2007-04-21, 5821👍, 0💬

How To Delete an Existing Row from a Table
How To Delete an Existing Row from a Table? - Oracle DBA FAQ - Understanding SQL DML Statements If you want to delete an existing row from a table, you can use the DELETE statement with a WHERE clause to identify that row. Here is good sample of DELETE statements: INSERT INTO fyi_links (url, id) VAL... 2007-04-21, 5595👍, 0💬

How To Use Existing Values in UPDATE Statements
How To Use Existing Values in UPDATE Statements? - Oracle DBA FAQ - Understanding SQL DML Statements If a row matches the WHERE clause in a UPDATE statement, existing values in this row can be used in expressions to provide new values in the SET clause. Existing values are represented by columns in ... 2007-04-21, 5532👍, 0💬

How To Set Up SQL*Plus Output Format
How To Set Up SQL*Plus Output Format? - Oracle DBA FAQ - Understanding SQL DML Statements If you want to practice SQL statements with SQL*Plus, you need to set up your SQL*Plus output formatting parameter properly. The following SQL*Plus commands shows you some examples: COLUMN id FORMAT 9999; COLUM... 2007-04-22, 5508👍, 0💬

How To Use Values from Other Tables in UPDATE Statements
How To Use Values from Other Tables in UPDATE Statements? - Oracle DBA FAQ - Understanding SQL DML Statements If you want to update values in one with values from another table, you can use a subquery in the SET clause. The subquery should return only one row for each row in the update table that ma... 2007-04-21, 5478👍, 0💬

How To Specify Default Values in INSERT Statement
How To Specify Default Values in INSERT Statement? - Oracle DBA FAQ - Understanding SQL DML Statements If a column is defined with a default value in a table, you can use the key word DEFAULT in the INSERT statement to take the default value for that column. The following tutorial exercise gives a g... 2007-04-21, 5452👍, 0💬

How To Update Values in a Table
How To Update Values in a Table? - Oracle DBA FAQ - Understanding SQL DML Statements If you want to update some values in one row or multiple rows in a table, you can use the UPDATE statement. The script below shows a good example: UPDATE fyi_links SET counts = 999, notes = 'Good site.' WHERE id = 1... 2007-04-21, 5406👍, 0💬

How To Omit Columns with Default Values in INSERT Statement
How To Omit Columns with Default Values in INSERT Statement? - Oracle DBA FAQ - Understanding SQL DML Statements If you don't want to specify values for columns that have default values, or you want to specify values to columns in an order different than how they are defined, you can provide a colum... 2007-04-21, 5165👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.