Ask the Experts
Ask the Experts
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First and last date of the current month
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What is a correlated subquery?
What is subquery and correlated subquery? What is the difference between them? Continue Reading
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Why "select star" is bad
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Insufficient privileges error ORA-01039
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Loading text data into Oracle with SQL*Loader
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Errors when importing from same version
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Creating a dynamic crosstab query with Oracle, part 1
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Relating Cartesian product to relational algebra and calculus
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Importing dump file from Oracle on Linux to Oracle on Windows
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How to reuse space in Oracle
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Weighted percentiles, part 1
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Importing/exporting wrapped PL/SQL procedures
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Counts and total count in one query
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Three consecutive days
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Gaps in sequences
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Calling a stored procedure in DB2 from Oracle 8.1.7
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How does RAC handle DML operation in failover?
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Two foreign keys to the same primary key?
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The integers table
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Supertypes and subtypes
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Oracle Forms Developer script to change Windows resolution
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Bank statements don't match AP, AR transactions
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What are modern database management system's applications?
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How to view report output generated by another user
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13 steps to replacing small redo log files
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What is error SP2-0678?
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26 performance tuning questions and solutions, #1-10
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What is ORA-06512?
Learn how to solve the ORA-6512 error in this tip on Oracle errors from an expert. Continue Reading
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Setting up ODBC driver for migration
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Calculations between two rows in one table
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Cumulative sums within groups
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Is RMAN backup smaller than normal OS-level backup?
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Transitive joins
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Fixed vs. variable size
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Moving data from Oracle report to MS Excel
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Best RAID level for database
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What's causing unable to extend lob segment error?
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One column contained in another
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Getting ORA-00604 error when connecting to database user
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Help with ORA-06554 regarding package DBMS_STANDARD
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How to determine what DDL changes have been made
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Why is database not functioning when SMON is killed
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Working with Arabic characters in Developer 6i
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Creating tables in PL/SQL
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SELECT/INTO and INSERT/SELECT
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Unable to insert records when using database link
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UPDATE one table based on a condition in another
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Date minus number
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Indexed vs. non-indexed database
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Accessing an ODBC data source, part 1
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Dynamic SPOOL file naming
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Using UNION to make a header
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How to pass a date to a stored procedure in Oracle9i
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Using a database link in a SQLLDR control file
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Seven steps to creating a catalog database
How do I create a catalog database for RMAN backup and recovery? Continue Reading
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Depersonalizing data
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Rebuild a table to reduce number of extents
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Using SQL to update e-mail addresses
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Why is database hanging?
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Derived table in DB2
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Closing custom form window
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Does Oracle reserve space for a VARCHAR2() datatype?
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Multiple instances vs. single instance
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Connecting Oracle and Visual FoxPro
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Subquery or join?
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Moving partitions
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Difference between ALL_OBJECTS and DBA_OBJECTS
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Solving error ORA-3113
The ORA-03113 error comes up when I insert in this table, but on other tables the insert takes place smoothly. Continue Reading
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Dates and DECODE
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Fiscal year, ISO week, part 2
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Converting columns to rows
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Does Oracle work better on Windows or Unix/Linux?
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Solving error ORA-12545
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Cycle relationships in ER diagram?
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Logical and physical data models explained
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What's an Oracle instance?
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Three ways to query a table relationship
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Combining a LEFT OUTER and INNER join
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UNION in a subquery
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A view for a MAX value in any month
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The Sybase list() aggregate function
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Table design in OLAP versus OLTP
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MI, CI and BI
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Counting number of transactions in a variable time
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Calculating initial, next and max extents
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What happens in background when in hot backup mode
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Specifying conditions in SQL*Loader control file using WHEN clause
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Nested GROUP BYs
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DECODE versus CASE
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PUBLIC versus PRIVATE synonyms
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Revoking EXECUTE ANY PROCUDURE FROM PUBLIC
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Resolving the ORA-01002 error
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Tracing queries in specific schema or database
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'Database level' versus 'instance level'