oracle – CodeRavo

Using DBMS_OUTPUT to Print Messages in Oracle Procedures

In Oracle, DBMS_OUTPUT is a package that allows you to print messages from PL/SQL code, such … Using DBMS_OUTPUT to Print Messages in Oracle ProceduresRead more

dbms-output, oracle, pl-sql, printing-messages, procedures

Understanding Oracle SIDs and Service Names

Oracle databases use two important identifiers: SID (System Identifier) and Service Name. While they are related, … Understanding Oracle SIDs and Service NamesRead more

database-instance, high-availability, listener-ora, load-balancing, oracle, service-name, sid, tnsnames-ora

Calculating Date Differences in Oracle

In Oracle, calculating the difference between two dates is a common task that can be achieved … Calculating Date Differences in OracleRead more

date-arithmetic, date-differences, datediff, oracle, to-date

Managing Password Expiration in Oracle Databases

Managing Password Expiration in Oracle Databases Oracle databases, by default, enforce password expiration policies to enhance … Managing Password Expiration in Oracle DatabasesRead more

database administration, dba, expiration, oracle, password, password-policy, profiles, reset-password, Security, unlock-account

Dropping Multiple Columns in SQL Tables

Dropping Multiple Columns in SQL Tables SQL tables often evolve over time, requiring modifications to their … Dropping Multiple Columns in SQL TablesRead more

alter table, data-management, database, database-design, drop-column, MySQL, oracle, PostgreSQL, schema-modification, SQL, SQL Server

Resolving ORA-30926: Unstable Rows in MERGE Operations

Understanding and Resolving ORA-30926 The Oracle error ORA-30926: unable to get a stable set of rows … Resolving ORA-30926: Unstable Rows in MERGE OperationsRead more

concurrency, data-consistency, database-error, distinct, dml, isolation-level, merge, ora-30926, oracle, rowid, troubleshooting

Extracting Text from BLOB Data in Oracle SQL

Understanding BLOBs and CLOBs in Oracle Oracle database provides different data types for storing various kinds … Extracting Text from BLOB Data in Oracle SQLRead more

binary data, blob, character-data, clob, data-conversion, database, dbms-lob, oracle, SQL, to-clob, utl-raw

Dropping Objects Conditionally in Oracle

In Oracle, you often need to drop objects such as tables, views, procedures, and more. However, … Dropping Objects Conditionally in OracleRead more

database-objects, Drop Table, exception handling, if-exists, oracle, SQL

Retrieving Column Names in Oracle Databases

Introduction When working with relational databases, it’s often necessary to programmatically retrieve information about table structures, … Retrieving Column Names in Oracle DatabasesRead more

all-tab-cols, column names, cx-oracle, data-dictionary, database, dba-tab-cols, desc, metadata, oracle, SQL, sql-injection, user-tab-cols

Retrieving Maximum Value Rows per Group

Retrieving Maximum Value Rows per Group A common data manipulation task involves extracting rows that correspond … Retrieving Maximum Value Rows per GroupRead more

data-retrieval, database, group by, maximum-value, oracle, query optimization, self-join, SQL, subquery, window-functions