Sql updating primary key value

15-Feb-2015 23:44

SQL select * from con; ID NAME CITY SALARY ---------- -------------------- ---------- ---------- 10 ABC B 1000 11 XYZ C 2000 13 DIFF 1 12 SOME 2000 Let us disable the primary key, assuming constraint name of primary key in ID column is CON_PR.SQL alter table con enable constraint con_pr; alter table con enable constraint con_pr * ERROR at line 1: ORA-02437: cannot validate (HR.After disabling the constraints, One can enter invalid values into the tables as per the constraint condition.for example, if you disable primary key constraint, it is possible to enter the duplicate value in primary key column and commit the same data in table. Problem will arise if you try to enable the primary key. If your table is small it easy to judge what rows have invalid values but this problem will become a junk when your table is big, say millions of row. but not to worry oracle database has a process to identify those row which have some invalid data as per the constraints.Product Vendor table form a composite PRIMARY KEY constraint for this table.This makes sure that that the combination of Product ID and Vendor ID is unique. Because Product Vendor contains both the Product ID and Vendor ID columns, both the Product table and the Vendor table can be accessed by their relationship to Product Vendor.You can create a primary key by defining a PRIMARY KEY constraint when you create or modify a table.

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In this table we can generate ROWID of all the rows by which we are getting the exception whenever we enabling it. Type ----------------------------------------- -------- ---------------------------- ROW_ID ROWID OWNER VARCHAR2(30) TABLE_NAME VARCHAR2(30) CONSTRAINT VARCHAR2(30) Before we start every time the exception we should check, EXCEPTION table should not have any row. Let us check output table for those potential set of ROWIDs which are violating the constraints. Most tables should have a primary key, and each table can have only ONE primary key.','165px');" onmouseover="Instant ASP_Open Menu Mouse Over('_ctl6_ctl Topic_ctl Panel Bar_ctl Topics Repeater__ctl8_sm Author Name','_ctl6_ctl Topic_ctl Panel Bar_ctl Topics Repeater__ctl8_sm Author Name_Simple Menu Div Layer','Hi, I have a requirement to update the values in a table thru SSIS, however, there is a primary key restriction.But the problem is I dont know how to do this via SSIS. Thanks, Paul There must be some level of detail missing here.You say you need to update a table, but then it all becomes quite fuzzy. Cross Tabs and Pivots, Part 1 – Converting Rows to Columns Cross Tabs and Pivots, Part 2 - Dynamic Cross Tabs Understanding and Using APPLY (Part 1)Understanding and Using APPLY (Part 2)','165px');" onmouseover="Instant ASP_Open Menu Mouse Over('_ctl6_ctl Topic_ctl Panel Bar_ctl Topics Repeater__ctl10_sm Author Name','_ctl6_ctl Topic_ctl Panel Bar_ctl Topics Repeater__ctl10_sm Author Name_Simple Menu Div Layer','Hi, I have a requirement to update the values in a table thru SSIS, however, there is a primary key restriction.

In this table we can generate ROWID of all the rows by which we are getting the exception whenever we enabling it. Type ----------------------------------------- -------- ---------------------------- ROW_ID ROWID OWNER VARCHAR2(30) TABLE_NAME VARCHAR2(30) CONSTRAINT VARCHAR2(30) Before we start every time the exception we should check, EXCEPTION table should not have any row. Let us check output table for those potential set of ROWIDs which are violating the constraints. Most tables should have a primary key, and each table can have only ONE primary key.','165px');" onmouseover="Instant ASP_Open Menu Mouse Over('_ctl6_ctl Topic_ctl Panel Bar_ctl Topics Repeater__ctl8_sm Author Name','_ctl6_ctl Topic_ctl Panel Bar_ctl Topics Repeater__ctl8_sm Author Name_Simple Menu Div Layer','Hi, I have a requirement to update the values in a table thru SSIS, however, there is a primary key restriction.But the problem is I dont know how to do this via SSIS. Thanks, Paul There must be some level of detail missing here.You say you need to update a table, but then it all becomes quite fuzzy. Cross Tabs and Pivots, Part 1 – Converting Rows to Columns Cross Tabs and Pivots, Part 2 - Dynamic Cross Tabs Understanding and Using APPLY (Part 1)Understanding and Using APPLY (Part 2)','165px');" onmouseover="Instant ASP_Open Menu Mouse Over('_ctl6_ctl Topic_ctl Panel Bar_ctl Topics Repeater__ctl10_sm Author Name','_ctl6_ctl Topic_ctl Panel Bar_ctl Topics Repeater__ctl10_sm Author Name_Simple Menu Div Layer','Hi, I have a requirement to update the values in a table thru SSIS, however, there is a primary key restriction.Because PRIMARY KEY constraints guarantee unique data, they are frequently defined on an identity column.