SQL Timestamp Converter [2025]
Generate SQL queries for timestamp conversions across PostgreSQL, MySQL, and SQL Server. Format dates and extract time components easily.
Unix Timestamp (seconds since 1970)
Truncate to Hour
First Day of Month
Last Day of Month
Age in Years
Day of Week (1-7)
Quarter-Year Format
Business Days from Date to Now
Fiscal Year (July-June)
Time Ago Expression
Database Timestamp Types
PostgreSQL
- •
TIMESTAMP
8 bytes, microsecond precision
- •
TIMESTAMPTZ
With timezone information
- •
DATE
4 bytes, date only
MySQL
- •
DATETIME
8 bytes, microsecond precision
- •
TIMESTAMP
4 bytes, seconds precision
- •
DATE
3 bytes, date only
SQL Server
- •
DATETIME2
6-8 bytes, configurable precision
- •
DATETIMEOFFSET
With timezone offset
- •
DATE
3 bytes, date only
Common Operations
Time Calculations
Add/Subtract Intervals
-- PostgreSQL
timestamp_column + INTERVAL '1 day'
-- MySQL
DATE_ADD(datetime_column, INTERVAL 1 DAY)
-- SQL Server
DATEADD(day, 1, datetime_column)
Range Queries
Date Range Filtering
-- Last 7 days
WHERE timestamp_column >= NOW() - INTERVAL '7 days'
-- Current month
WHERE DATE_TRUNC('month', timestamp_column) = DATE_TRUNC('month', CURRENT_DATE)
Best Practices
Data Storage
- •
Use UTC
Store timestamps in UTC timezone
- •
Appropriate Type
Choose types based on precision needs
- •
Index Strategy
Index frequently queried timestamp columns
Query Performance
- •
Sargable Queries
Avoid functions on indexed columns
- •
Date Boundaries
Use half-open intervals for ranges
- •
Partitioning
Consider time-based partitioning for large tables
Frequently Asked Questions
What's the difference between TIMESTAMP and DATETIME?
TIMESTAMP typically stores UTC time and handles timezone conversions automatically, while DATETIME stores the literal time value without timezone awareness. The exact behavior varies by database system.
How can I handle timezone conversions?
Each database has built-in functions for timezone handling. PostgreSQL uses AT TIME ZONE, MySQL uses CONVERT_TZ(), and SQL Server uses AT TIME ZONE. It's recommended to store timestamps in UTC and convert only when displaying.
Which timestamp precision should I use?
Choose based on your application needs. For most applications, second precision is sufficient. If you need to track more granular changes or handle high-frequency events, consider microsecond precision.
How do I optimize timestamp queries?
Create indexes on frequently queried timestamp columns, use sargable queries that can utilize indexes, and consider partitioning large tables by time ranges for better performance.
Comments
No comments yet
Be the first to share your thoughts! Your feedback helps us improve our tools and inspires other users.
More Time Tools
Age Calculator
Calculate your age & remaining time on this planet
Age Difference Calculator
Determine difference in ages
Chrome Timestamp Converter
Convert Chrome/Webkit timestamps into human readable dates
Clarion Date Converter
Convert between Clarion and human-readable dates
Countdown Timer
Everything you ever wanted in a timer
Date Difference Calculator
Determine the difference between two dates
Date Formatter
Format dates in all kinds of ways
Discord Timestamp Converter
Convert any date to Discord's own format
DMESG Timestamp Converter
Convert Linux DMESG dates to human readable ones
JSON Timestamp Converter
Convert JSON dates to standard formats
LDAP Timestamp Converter
Convert LDAP to human readable dates
MongoDB Timestamp Converter
Convert ObjectIDs to human readable dates
NTP Timestamp Converter
Convert between NTP format and regular timestamps
Pomodoro Timer
Use this famous focus technique to your advantage
Retirement Calculator
Calculate the time until you reach retirement
Roman Date Converter
Convert between Roman and Gregorian dates
Time Unit Converter
Convert from miliseconds all the way to years
Timezone Converter
Travel across the globe with our timezone converter
Windows Timestamp Converter
Convert Integer8 to human readable dates
Work Hours Calculator
Calculate your work hours over a given time period