mssqldata validation

Validate Phone Number in SQL Server with PATINDEX

Use SQL Server PATINDEX to validate phone number formats in T-SQL. Examples for phone number checking in MSSQL databases.

The Regex Pattern

Regex pattern

%[0-9][0-9][0-9]%[0-9][0-9][0-9]%[0-9][0-9][0-9][0-9]%

Use this pattern with mssql's REGEXP operator.

mssql SQL Example

-- Use PATINDEX in SQL Server to check if phone_number column values conform to standard formats in a contacts table
SELECT *
FROM your_table
WHERE your_column REGEXP '%[0-9][0-9][0-9]%[0-9][0-9][0-9]%[0-9][0-9][0-9][0-9]%';

How This Works

Use PATINDEX in SQL Server to check if phone_number column values conform to standard formats in a contacts table. The regex pattern is used with mssql's REGEXP operator to filter rows at the database level.

Using regex directly in SQL is efficient for use cases like data validation — it avoids loading data into application memory just to filter it with a regex.

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