SQL – Page 2 – CodeRavo

Transposing Data in SQL

Transposing data in SQL refers to the process of swapping rows with columns or vice versa. … Transposing Data in SQLRead more

Aggregate Functions, dynamic-sql, pivot, pivot-tables, SQL, transposing-data, union-all, unpivot

Finding the Maximum Date Across Multiple Columns in SQL

Introduction When working with relational databases, a common task is to extract meaningful insights from tables. … Finding the Maximum Date Across Multiple Columns in SQLRead more

common-table-expression-cte, greatest-function, inline-table-valued-functions, max, SQL, subquery, unpivot

Monitoring Oracle Database Connections

Oracle databases handle numerous connections concurrently, and monitoring these connections is crucial for performance analysis, troubleshooting, … Monitoring Oracle Database ConnectionsRead more

connections, database, database administration, monitoring, oracle, performance, sessions, SQL, v-session

String Comparison in SQL: Choosing Between '=' and 'LIKE'

String Comparison in SQL: Choosing Between ‘=’ and ‘LIKE’ SQL provides several ways to compare strings, … String Comparison in SQL: Choosing Between '=' and 'LIKE'Read more

case sensitivity, database, equals, like, pattern matching, performance, query, regular expressions, SQL, string-comparison, wildcard

Working with Dates in SQL

When working with dates in SQL, it’s essential to understand how to compare and manipulate them … Working with Dates in SQLRead more

best practices, culture-invariant-formats, Date Comparison, Dates, parameterized-queries, SQL

Finding Common Entries with SQL: Retrieving Complete Songs for Selected People

Introduction In relational databases, filtering and aggregating data based on specific conditions is a common requirement. … Finding Common Entries with SQL: Retrieving Complete Songs for Selected PeopleRead more

aggregation, distinct, group by, having-clause, parameterization, SQL, subquery, where-clause

Retrieving Table Column Names in Oracle

Understanding Database Metadata When working with databases, it’s often necessary to understand the structure of the … Retrieving Table Column Names in OracleRead more

all-tab-columns, column names, data-dictionary, database, describe, metadata, oracle, SQL, table-structure

Working with Identifiers and Schemas in PostgreSQL

PostgreSQL is a powerful, open-source relational database system. A common issue beginners (and sometimes experienced developers) … Working with Identifiers and Schemas in PostgreSQLRead more

case sensitivity, database, identifiers, naming-conventions, PostgreSQL, query, schema, search-path, SQL, table-name

Identifying and Retrieving Duplicate Records in MySQL

Identifying and Retrieving Duplicate Records in MySQL Data duplication is a common issue in database management. … Identifying and Retrieving Duplicate Records in MySQLRead more

data integrity, Database Management, duplicate-records, group by, having, MySQL, self-join, SQL, subquery

Using SQL CASE Statements for Conditional Updates

The SQL CASE statement is a powerful tool that allows you to perform conditional operations on … Using SQL CASE Statements for Conditional UpdatesRead more

CASE statement, conditional-updates, join(), SQL, table-variable, where-clause