SQL Concat, Aggregate and Split Function

DECLARE @string1 NVARCHAR(100) = 'Chocolate with beans from';

DECLARE @string2 NVARCHAR(100) = 'has a cocoa percentage of';


SELECT 

bean_type,

bean_origin,

cocoa_percent,

-- Create a message by concatenating values with "+"

@string1 + ' ' + bean_origin + ' ' + @string2 + ' ' + CAST(cocoa_percent AS nvarchar) AS message1

FROM ratings

WHERE 

company = 'Ambrosia' 

AND bean_type <> 'Unknown';



Concat Function

To add multiple string together  


Concat()


DECLARE @string1 NVARCHAR(100) = 'Chocolate with beans from';

DECLARE @string2 NVARCHAR(100) = 'has a cocoa percentage of';


SELECT 

bean_type,

bean_origin,

cocoa_percent,

-- Create a message by concatenating values with "+"

@string1 + ' ' + bean_origin + ' ' + @string2 + ' ' + CAST(cocoa_percent AS nvarchar) AS message1,

-- Create a message by concatenating values with "CONCAT()"

CONCAT(@string1,' ' ,bean_origin , ' ', @string2,' ',cocoa_percent) AS message2

FROM ratings

WHERE 

company = 'Ambrosia' 

AND bean_type <> 'Unknown';



Contact_WS()


DECLARE @string1 NVARCHAR(100) = 'Chocolate with beans from';

DECLARE @string2 NVARCHAR(100) = 'has a cocoa percentage of';


SELECT 

bean_type,

bean_origin,

cocoa_percent,


CONCAT_WS(' ', @string1, bean_origin, @string2, cocoa_percent) AS message3

FROM ratings

WHERE 

company = 'Ambrosia' 

AND bean_type <> 'Unknown';


STRING_AGG Function Using Group by

SELECT  

company,

    -- Create a list with all bean origins ordered alplabetically

STRING_AGG(bean_origin, ',') WITHIN GROUP (ORDER BY bean_origin) AS bean_origins

FROM ratings

WHERE company IN ('Bar Au Chocolat', 'Chocolate Con Amor', 'East Van Roasters')

-- Specify the columns used for grouping your data

GROUP BY company;



String SPLIT Function 


DECLARE @phrase NVARCHAR(MAX) = 'In the morning I brush my teeth. In the afternoon I take a nap. In the evening I watch TV.'


SELECT value

FROM STRING_SPLIT(@phrase,'.');




You will get the chance to use functions like: LEN(), UPPER(), PATINDEX(), CONCAT(), REPLACE() and SUBSTRING()



SELECT

    -- Concatenate the first and last name

CONCAT('***' , first_name, ' ', UPPER(last_name), '***') AS name,

    -- Mask the last two digits of the year

    REPLACE(birthdate, SUBSTRING(CAST(birthdate AS varchar), 3, 2), 'XX') AS birthdate,

email,

country

FROM voters

   -- Select only voters with a first name less than 5 characters

WHERE LEN(first_name) < 5

   -- Look for this pattern in the email address: "j%[0-9]@yahoo.com"

AND PATINDEX('j_a%@yahoo.com', email) > 0;  

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