The VARCHAR(Max) data type stores variable-length character strings.
VARCHAR(Max) is used to store very large, i.e. Max, character data.
VARCHAR(Max) can hold as much as 2GB of ASCII character data.
The word VARCHAR stands for varying character.
A table with 2 VARCHAR(Max) columns.
CREATE TABLE DemoTable
(
Id INT IDENTITY,
FullName VARCHAR(100),
Subject VARCHAR(max),
Message VARCHAR(max)
);
GO
INSERT INTO DemoTable VALUES ('Harold Smith', 'Technical Support', 'Hi, please help me fix ...');
INSERT INTO DemoTable VALUES ('Robert Wang', 'After Sales', 'Greetings! I need to know the details ...');
INSERT INTO DemoTable VALUES ('Janice Lopez', 'After Sales', 'Are you also opening ...');
INSERT INTO DemoTable VALUES ('Kelly Wilson', 'Customer Support', 'Can you help me find the ...');
INSERT INTO DemoTable VALUES ('Grace Taylor', 'Technical Support', NULL);
GO
SELECT * FROM DemoTable;
GO
DROP TABLE DemoTable;
GO
Very large character strings can be stored in Subject and Message.
| Id | FullName | Subject | Message |
|---|---|---|---|
| 1 | Harold Smith | Technical Support | Hi, please help me fix ... |
| 2 | Robert Wang | After Sales | Greetings! I need to know the details ... |
| 3 | Janice Lopez | After Sales | Are you also opening ... |
| 4 | Kelly Wilson | Customer Support | Can you help me find the ... |
| 5 | Grace Taylor | Technical Support | NULL |
Syntax of VARCHAR(Max).
VARCHAR(Max)
| ORDER |
|---|
| Id |
| OrderDate |
| OrderNumber |
| CustomerId |
| TotalAmount |
SELECT MONTH(OrderDate) AS [Month],
'$' + CONVERT(VARCHAR(Max), SUM(CAST(TotalAmount AS MONEY)), 3) AS 'Total Sales'
FROM [Order]
WHERE YEAR(OrderDate) = 2013
GROUP BY MONTH(OrderDate)
ORDER BY MONTH(OrderDate)
Storing values in VARCHAR(Max) is overkill in this situation.
A smaller VARCHAR or
CHAR type would suffice.
| Month | Total Sales |
|---|---|
| 1 | $ 66,692.80 |
| 2 | $ 41,207.20 |
| 3 | $ 39,979.90 |
| 4 | $ 55,699.39 |
| 5 | $ 56,823.70 |
 |
|
