Date formats

About

Date/Time format strings define how date and time values are interpreted, converted, and displayed.

A format string consists of format specifiers, with each specifier representing a specific part of a date or time, such as the day, month, year, hour, minute, or second.

Key Features

• Format Specifiers — Symbols used to represent individual date and time components, such as day, month, year, hour, minute, and second.
• Case Sensitivity — Most format specifiers are case-insensitive. However, am/pm and a/p require the appropriate casing.
• Flexible Formatting — Format strings can be combined to match a wide range of date and time representations.

For example:

dd/mm/yyyy

can be used to represent a date such as:

30/08/2026

Using the correct Date/Time format string ensures that values are parsed and formatted consistently during data processing.

Understanding Date/Time Formats

It is essential to note that the date/time format is unrelated to the target database. Instead, it defines the format of the source data. This format helps the software convert string data into a date or time type, making it suitable for loading into a date or timestamp field later.

Examples of Source Data and Corresponding Formats

• Source Data: 16/08/2009 → Format: DD/MM/YYYY
• Source Data: 1/31/2009 → Format: M/D/YYYY
• Source Data: 2006-05-23 22:34:42.096 → Format: YYYY-MM-DD HH:NN:SS.FFF
• Source Data: 1992/mar/12 00:00 → Format: YYYY/MMM/DD HH:NN

Performance Considerations

• Processor-Intensive Operation: Applying a date/time format requires significant processing resources.
• Shorter Formats Are Faster: Using concise formats improves performance.
• Avoid Month Names: Formats without month names are quicker to process.
• Comparison:
  • dd/mm/yyyy is faster than d/m/yy.

By selecting appropriate date/time formats, efficiency can be improved while ensuring accurate data conversion.

Optimizing Date/Time Format Application

If the source data is already in the YYYY-MM-DD HH:NN:SS.FFF format, there is no need to apply any additional formatting. This saves processing time and ensures optimal performance, as the data is already in a compatible structure for conversion.

Key Point

• Avoid unnecessary operations when the source data matches the expected format.

Important: Working with Date and Time fields