database performance – CodeRavo

Selecting Specific Columns with Spring JPA

When working with databases using Spring JPA, it’s often necessary to select specific columns from a … Selecting Specific Columns with Spring JPARead more

custom-queries, database performance, native-queries, projections, spring-jpa

Optimizing Record Existence Checks in SQL Queries

When working with databases, it’s common to need to check if a record exists before performing … Optimizing Record Existence Checks in SQL QueriesRead more

count, database performance, exists, optimization, record-existence, select-top-1, SQL

Extracting Dates from Datetime Columns in MySQL

When working with datetime columns in MySQL, it’s common to need to extract just the date … Extracting Dates from Datetime Columns in MySQLRead more

database performance, date-extraction, DateTime, indexing, MySQL, query optimization

Understanding and Avoiding the N+1 Selects Problem in Object-Relational Mapping

Object-Relational Mapping (ORM) is a technique used to interact with databases using objects, rather than writing … Understanding and Avoiding the N+1 Selects Problem in Object-Relational MappingRead more

database performance, eager-loading, join-fetching, n-1-selects-problem, object-relational-mapping, orm

Creating Temporary Tables from Select Statements

Temporary tables are a useful feature in databases that allow you to store data temporarily for … Creating Temporary Tables from Select StatementsRead more

database performance, MySQL, query optimization, select-statements, Temporary Tables

Understanding `WITH (NOLOCK)` in SQL Server: Use Cases, Risks, and Alternatives

In this guide, we will explore the concept of using WITH (NOLOCK) in SQL Server. This … Understanding `WITH (NOLOCK)` in SQL Server: Use Cases, Risks, and AlternativesRead more

data-consistency, database performance, dirty-reads, isolation-levels, rcsi, read-uncommitted, row-versioning, SQL Server, with-nolock

Handling MySQL Connection Timeouts

Handling MySQL Connection Timeouts When working with MySQL databases, especially with long-running queries or large datasets, … Handling MySQL Connection TimeoutsRead more

connection, connection-pooling, database performance, error-2013, max-allowed-packet, MySQL, net-read-timeout, query optimization, timeout, wait-timeout

Updating Tables with Joins in Oracle SQL

Introduction In SQL, updating records based on conditions that span multiple tables is a common requirement. … Updating Tables with Joins in Oracle SQLRead more

data integrity, database performance, inline-view, MERGE Statement, oracle-sql, subquery, update-with-join

Understanding and Resolving MySQL "Lock Wait Timeout Exceeded" Errors

Introduction In database management, particularly when working with MySQL, encountering errors like "Lock wait timeout exceeded; … Understanding and Resolving MySQL "Lock Wait Timeout Exceeded" ErrorsRead more

database performance, InnoDB, lock-wait-timeout, MySQL, query optimization, transaction-isolation-level

Selecting Top N Records in Oracle SQL: Techniques and Optimizations

Introduction In Oracle SQL, selecting a specific number of records from a dataset is a common … Selecting Top N Records in Oracle SQL: Techniques and OptimizationsRead more

database performance, fetch-first, oracle-sql, query optimization, rownum, top-n-records