sql-query – CodeRavo

Performing Updates with Joins in PostgreSQL

Updating Data Based on Joined Tables in PostgreSQL PostgreSQL is a powerful, open-source relational database system. … Performing Updates with Joins in PostgreSQLRead more

common-table-expression, cte, database, database-update, join(), PostgreSQL, SQL, sql-query, update, update-with-join

Removing Duplicate Rows in Oracle Databases

Identifying and Removing Duplicate Data Duplicate data can creep into any database over time, causing issues … Removing Duplicate Rows in Oracle DatabasesRead more

data integrity, Database Management, delete, duplicate-data, oracle, rowid, SQL, sql-query, window-functions

Retrieving and Inserting MySQL Table Names Using SQL Queries

Introduction Managing databases often involves dynamically handling tables, especially when you need to perform operations like … Retrieving and Inserting MySQL Table Names Using SQL QueriesRead more

Database Management, information-schema, INSERT INTO, metadata, MySQL, SELECT statement, sql-query, table-names

Conditional Logic with the SQL CASE Statement

Conditional Logic with the SQL CASE Statement The CASE statement is a powerful tool in SQL … Conditional Logic with the SQL CASE StatementRead more

CASE statement, conditional expressions, conditional logic, data manipulation, database, SQL, sql-query, sql-tutorial

Checking for Empty or Null Values in MySQL

Identifying Empty or Null Data in MySQL When working with databases, it’s common to encounter columns … Checking for Empty or Null Values in MySQLRead more

COALESCE, data integrity, data validation, database, empty string, is-null, MySQL, null, sql-query, string manipulation, trim

Transforming Rows into Columns with SQL Server's PIVOT Function

Introduction In data analysis, there are scenarios where transforming rows of data into columns can significantly … Transforming Rows into Columns with SQL Server's PIVOT FunctionRead more

data-transformation, dynamic-pivot, pivot-function, SQL Server, sql-query, sql-tutorial, static-pivot

Updating Tables with Data from Other Tables in Oracle SQL

Updating Tables with Data from Other Tables in Oracle SQL In relational databases, a common task … Updating Tables with Data from Other Tables in Oracle SQLRead more

data-modification, database-update, MERGE Statement, oracle-sql, sql-query, sql-update, table-update, update-from-another-table, update-statement

Inserting Line Breaks in SQL Server Strings: A Practical Guide

Introduction When working with strings in SQL Server, particularly within VARCHAR or NVARCHAR data types, you … Inserting Line Breaks in SQL Server Strings: A Practical GuideRead more

char-10, char-13, crlf, database-string-manipulation, line-breaks, nvarchar, SQL Server, sql-query, ssms, varchar