Updating table in oracle

You will be given questions that you need to solve.

updating table in oracle-44

Bill Koster CSC/DECC" id="ctl00_m_m_i_ctl00_gr_ctl07_bestanswerbody" class="textarea-bestanswerhidden" name="bestanswerbody" answerbody Id="5190413" / update (select a.i as a, b.i as b from a,b where a.i=b.i) set b=-1; HTH Ananthram" id="ctl00_m_m_i_ctl00_gr_ctl09_bestanswerbody" class="textarea-bestanswerhidden" name="bestanswerbody" answerbody Id="5190429" / update a,b set a.col5=-1,a.col7=b.col7, a.col8 = b.col8 where a.col1 =b.col1 and a.col2=b.col2 it works much faster then using "exists" if there are indexes on link columns.

thanks Helen" id="ctl00_m_m_i_ctl00_gr_ctl11_bestanswerbody" class="textarea-bestanswerhidden" name="bestanswerbody" answerbody Id="5190984" / I use this method: update a,b set a.col5=-1,a.col7=b.col7, a.col8 = b.col8 where a.col1 =b.col1 and a.col2=b.col2 it works much faster then using "exists" if there are indexes on link columns.

Experts, I wanted to join two tables and update a single column as -1 This statement is giving errors.

update tab a set col1 = -1 from tab b where a.col2 = b.col2 and a.col3 = b.col3 and a.col3 = b.col4 Can anyone throw some light on this? I looks like it should be something like this: update a set col1 = -1 from tab a, tab b where a.col2 = b.col2 and a.col3 = b.col3 and a.col4 = b.col4 HTH, Ananthram" id="ctl00_m_m_i_ctl00_gr_ctl01_bestanswerbody" class="textarea-bestanswerhidden" name="bestanswerbody" answerbody Id="5190317" / update tab a set col1 = -1 where exists (select 1 from tab b where a.col2 = b.col2 and a.col3 = b.col3 and a.col3 = b.col4 ) Method 2: update tab a set (col1,col7,col8) = (select -1, col7,col8 from tab b where a.col2 = b.col2 and a.col3 = b.col3 and a.col3 = b.col4 ) where exists (select 1 from tab b where a.col2 = b.col2 and a.col3 = b.col3 and a.col3 = b.col4 ) Note: In Method 2 the sub-query must return only 1 row.

The section titled "Deleting a row using a session bean data control" explains how to refresh the table when a method such as remove Entity() is called and the user remains on the same page.

Another option in this scenario is to insert a new row. For example, the image below depicts an insert form where the user enters new data and clicks a submit button to insert the row: The Create button on this page calls the persist Entity() data control method from the session bean.

In this article, we are going to look at four scenarios for Oracle cross table update. Category_ID) where exists ( select * from Categories b where b. These columns uniquely identify a record in a table.

Suppose we have two tables Categories and Categories_Test. The common column in the two tables is CATEGORY_ID. Please note that query below is used for illustration purpose because Category_ID alone is primary key.

The basic format is: Let's go back to the AUTHOR table and look at some examples of Oracle updates.

Tags: , ,