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332. CONVERT Function

Learn how SQL Server can convert values between different data types and formats.

📘 Lesson 332 of 728 ⏱ 10 min 🎯 Intermediate

CONVERT is a SQL Server function used to convert an expression from one data type to another and can also support formatting styles for certain data types.

Data conversion is essential when combining datasets, performing calculations, formatting dates, and preparing database output.

Convert a datetime value into a date in SQL Server.

SQL 
SELECT
    CONVERT(DATE, OrderDate) AS OrderDate
FROM Orders;

CONVERT is widely used in SQL Server reporting, ETL processes, data cleansing, and date formatting.

  • CONVERT changes a value's data type.
  • It is commonly associated with SQL Server.
  • It supports style codes for some conversions.
  • It is useful for date formatting.
  • CAST is generally more portable.
What is CONVERT used for?

CONVERT changes an expression from one data type to another in SQL Server.

What is one difference between CAST and CONVERT?

CAST is generally more portable SQL, while CONVERT is SQL Server-specific and provides additional formatting options.

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