sql check if string contains letters – How To Check If A String Contains A Substring In SQL Server?

sql check if string contains letters – Method 1 – Using CHARINDEX() function, Method 2 – Using LIKE Predicate – To check if string contains letters uses the operator LIKE with the following regular expression ‘[A-Za-z]%’.

sql check if string contains letters

Check if string contains letters : How To Check If A String Contains A Substring In SQL Server?

check if string contains substring sql

Declare @mainString nvarchar(100)='Pakainfo Website Examples'  
---Check here @mainString contains Pakainfo or not, if it contains then retrun greater than 0 then print detect otherwise Not detect  
if CHARINDEX('Pakainfo',@mainString) > 0   
begin  
   select 'detect' As Result  
end  
else  
    select 'Not detect' As Result 

sql where contains part of string

To detect an exact string

SELECT * FROM [table] WHERE [field] LIKE '%stringtosearchfor%'.

Method 2 – Using LIKE Predicate

DECLARE @WholeString VARCHAR(50)
DECLARE  @ExpressionTodetect VARCHAR(50)
SET @WholeString = 'Pakainfo Website Examples'
SET @ExpressionTodetect = 'Website'

IF @WholeString LIKE '%' + @ExpressionTodetect + '%'
    PRINT 'Yes it is detect'
ELSE
    PRINT 'It doesn''t detect'

The following SELECT satement selects records from Members table of Northwind database where Member’s Title contains a substring, ‘Sales’.

SELECT [MemberID]
,[LastName]
,[FirstName]
,[Title]
FROM [NORTHWND].[dbo].[Members]
WHERE Title LIKE '%Sales%'

SQL Check if string contains letters

Return all rows

DECLARE @ShopProducts table (name varchar(250));
INSERT INTO @ShopProducts(name) values ('abcABCdef');
INSERT INTO @ShopProducts(name) values ('111');
INSERT INTO @ShopProducts(name) values ('ab5cABCdef2');
SELECT * FROM @ShopProducts;
GO

Return rows that contains letters

DECLARE @ShopProducts table (name varchar(250));
INSERT INTO @ShopProducts(name) values ('abcABCdef');
INSERT INTO @ShopProducts(name) values ('111');
INSERT INTO @ShopProducts(name) values ('ab5cABCdef2');
SELECT * FROM @ShopProducts WHERE name LIKE '[A-Za-z]%';
GO

Don’t Miss : PHP Preg_match
Check if string contains leading letters

You can check if a string contains letters in SQL using the LIKE operator and pattern matching with regular expressions.

Here is an example query:

SELECT *
FROM table_name
WHERE column_name LIKE '%[a-zA-Z]%'

In this query, table_name is the name of the table you want to query, and column_name is the name of the column that contains the string you want to check.

The % symbols are wildcards that match any number of characters. The [a-zA-Z] pattern matches any letter in the English alphabet, both uppercase and lowercase.

So, the LIKE operator with the [a-zA-Z] pattern will match any string that contains at least one letter. If there are no letters in the string, the LIKE operator will not match and the query will return no rows.

You can modify the pattern to match specific letters or characters as needed. For example, to check if a string contains only letters and spaces, you can use the following pattern:

SELECT *
FROM table_name
WHERE column_name LIKE '%[a-zA-Z ]%'

In this case, the pattern includes a space character in addition to the letters.

In conclusion, you can check if a string contains a substring in SQL Server using either the CHARINDEX() function or the LIKE predicate with wildcard characters. CHARINDEX() returns the starting position of the substring within the string, while LIKE checks for the presence of the substring using pattern matching. Both methods are effective for searching strings in SQL Server.