Counting Unique Transactions per Month, Excluding Follow-up Failures in Vertica and Other Databases

Removing Duplicate Records from Key/Value Pair Table in SQL Server Using string_agg()

Calculating Age and Updating Table Values in PostgreSQL: A Step-by-Step Guide to Efficient Querying

Applying Conditions to Child Records in SQL: A Deep Dive

Understanding the Role of \r\n in SQL Queries: Mastering Platform Independence and Row Separation

Understanding SQL Timestamp Queries in Oracle Databases for Valid Date Entries

SQL Aggregation with Inner Join and Group By: Correcting Query Issues

Counting XML Nodes in T-SQL: A Comprehensive Guide

Rebuilding Queries with Joins: A Creative Solution for Data Uniqueness.

Querying Months and Number of Days in a Month of the Current Year in SQL