Sql updating table from temp table datingintheie com


18-Mar-2019 18:13

drop table is different from deleting all of the records in the table.

Deleting all of the records in the table leaves the table including column and constraint information.

To illustrate the concept, consider the following example from the DBA world.

In the query that follows, we want to identify all users who exist within Oracle who have not been granted a role.

Presume that the Tickets table has a Ticket Template Id field that indicates what template is to be applied to the ticket.

Once this value has been assigned, the following UPDATE statement could be executed to copy the template's pre-defined values to the non-assigned data points in the Tickets table: UPDATE Tickets SET Priority Id = ISNULL(Tickets.

If the amount of data to be processed or utilized from your PL/SQL procedure is too large to fit comfortably in a PL/SQL table, use a GLOBAL TEMPORARY table rather than a normal table.

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how to loop select query result in sql, Iterating through result set, Iterating through table records, Loop, loop select query result in sql, Loop through one row at a time, Looping construct in Sql, Looping table having duplicates, Looping table having gaps, Looping table records in Sql, Looping table rows in Sql, Looping table rows one row at a time, Looping through table records, Looping through table records in Sql Server, Sql, Sql loop select query result, Sql Server, WHILE This article lists out extensive list of example scripts for looping through table records one row at a time.This article covers the examples for the following scenario’s for looping through table rows [ALSO READ] WHILE loop in Sql Server To understand the looping of the table records in the above listed scenarios, let us first create a temporary table #Employee as shown in the below image with sample data using the following script.Script: USE TEMPDB GO CREATE TABLE #Employee (Id INT, Name NVARCHAR(100), Status TINYINT) GO INSERT INTO #Employee ( Id, Name, Status) Values (1, ' Basavaraj Biradar', 0), (2, ' Shree Biradar', 0), (3, ' Kalpana Biradar', 0) GO Issue with example 1’s approach 1 and 2: These example approaches are assuming that looping column values doesn’t have any gap in it.Let us see what is the output of the example 1’s approach 1 and 2 if we have gaps in the looping column value.

To create a gap, delete employee record from the #Employee table with id = 2 by the following script: RESULT: Now let us run the example 1’s approach 1 and 2 script on #Employee table which is having gap in the Id column value (i.e. From the above result it is clear that the example 1’s approach 1 and 2 script will not work in the scenarios where we have gap in the looping tables column values.

Consider a help desk application that allows support staff to create support tickets, where each ticket in the system exists as a record in the Tickets table. To ease data entry, let's say that administrative users can create "ticket templates," which pre-define the values for a number of ticket data points that are stored in a table named Ticket Templates.



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