Day-to-day Problems & Solutions for DBA’s

Problems & Solutions

# Records has to be inserted in a table which has foreign keys and constraints.

It’s like update the table and it may have duplicate values also.

Solution

# Findout all the foreign key’s and table constraints.

(dba_constraints, dba_cons_columns)

# Disable all constraints

(ALTER TABLE table_name DISABLE CONSTRAINT constraint name;)

# If unique constraint is present, Truncate the Table.*

(Before truncating consult with developers, and team lead and read release notes if any)

(TRUNCATE TABLE schema.tablename;)

# Load the records into the table.(insertion)

# Commit;

# Enable all disabled constraints.

(ALTER TABLE table_name ENABLE CONSTRAINT constraint_name;)

*

If unique constraints are prestnt

ORA-02298 error will come,…..parent keys are not enabled,

Findout out primary key difference in foreign table and delete the(those)records…

(DELETE FROM foreign_table WHERE column_name = 799;) and proceed


# Allocate space for a user fernando who’s id already exists and grant write permissions in devalert73 database.

Solution:

ALTER USER fernando QUTOA 5M ON users;

GRANT develop TO fernando; ( develop – write permission role)


# Next extent allocation failure for a table.

Solution

ALTER TABLE owner.table_name

STORAGE (NEXT 500K PCTINCREASE 1);

PCTINCREASE is set to 1 – SMON releases the freed extents


# Create a new user with create session privilage

Solustion:

. CREATE USER roysys IDENTIFIED EXTERNALLY

DEFAULT TABLESPACE users

TERMPORARY TABLESPCAE temp;

. GRANT create session TO roysys.

Have a Oracle Question
Do you have an Oracle Question?

Oracle Books
Oracle Certification, Database Administration, SQL, Application, Programming Reference Books

Oracle Home
Oracle Database, SQL, Application, Programming Tips

All the site contents are Copyright © www.erpgreat.com and the content authors. All rights reserved.
All product names are trademarks of their respective companies.
The site www.erpgreat.com is not affiliated with or endorsed by any company listed at this site.
Every effort is made to ensure the content integrity.  Information used on this site is at your own risk.
 The content on this site may not be reproduced or redistributed without the express written permission of
www.erpgreat.com or the content authors.