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mcoliver88
Starting Member
1 Post |
 Posted - 2014-05-23 : 17:22:19
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| Hi AllI am new to SQL so please don't bash my skills i am still learning. I am learning SQL and i have created a database for college administration system, The tables i create are working perfectly, but its when i insert the data i get the problem. Here is my script:http://pastebin.com/1yew4h7nWhen i add the data i get an issue stating that their is an integrity violation and that the primary key in another table can't be found. I get this with a lot of tables. Any help will be great.O BTW i am using Oracle SQL plus to build the databaseThanksMichael |
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tkizer
Almighty SQL Goddess
38200 Posts |
Posted - 2014-05-23 : 17:42:20
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| I don't click on sketchy links, but based on your description you are getting the error because you are inserting the data in the wrong order.When there are foreign keys, parent data must exist before the child data. And in reverse, you can't delete parent data until the child data has been deleted.By the way, SQLTeam is for Microsoft SQL Server. For Oracle help, you'll need to find a different site.Tara KizerSQL Server MVP since 2007http://weblogs.sqlteam.com/tarad/ |
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TG
Master Smack Fu Yak Hacker
6065 Posts |
Posted - 2014-05-23 : 17:46:26
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This whole site is specific to MS Sql Server so for Oracle questions you should post to an oracle forum (ie: dbforums.com)However,looking at your script the problem is that you need to insert into the tables in the correct sequence so that you don't violate any foreign key constraints. So start with the table(s) that have no FK constraints, then work your way through so that you don't attempt to insert a row that has a dependency on a row in a different table that hasn't already been inserted.EDIT: Be One with the OptimizerTG |
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GouravSaxena1987
Starting Member
23 Posts |
Posted - 2014-05-27 : 13:30:35
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| You need to insert data in tables sequentially.i.e. first insert data in table which has only primary key and no foreign key.Then insert data in table which has first table's primary key as foreign key and so on....Use CASCADE Update/Delete.See below link-http://technet.microsoft.com/en-us/library/aa902684%28v=sql.80%29.aspxRegards,Gourav SaxenaData Warehouse CounsultantGouravSaxena1987@gmail.com |
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TG
Master Smack Fu Yak Hacker
6065 Posts |
Posted - 2014-05-27 : 13:46:57
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quote:
Originally posted by GouravSaxena1987
Use CASCADE Update/Delete.
I would not suggest you implement cascade actions unless the business requirements want that. Big difference between automatically cascading through your model deleting data from receiving a message saying "you can't delete that".Be One with the OptimizerTG |
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Issue with foreign keys in DB