How to find minimum length of string in SQL

Hi,I have a column set to varchar(12) so I can ensure that the length of the string entered will never be more than 12 characters but I want to limit the string to a minimum of 8 characters, so I end up with a string that is from 8-12 characters long. How do I ensure the minimum length of 8 characters? I'm using SQL Server 2005 if that helps. I tried adding a check constraint like so:DATALENGTH(UserName) >= 8But I keep getting an error when I save the table, so any help would be very much appreciated.

Thanks

SELECT MIN(LENGTH()) AS MinColumnLength FROM Table; If we include any non-aggregate functions into our query then we need a GROUP BY clause. Also, we could replace the above syntax examples with LEN or DATALENGTH for SQL Server.

How do you find the longest and shortest length in SQL?

“how to find shortest and longest string in sql” Code Answer’s

# IN the example below, “CITY” is the filed, “STATION” is the Table.
(SELECT CITY, LENGTH(CITY)
FROM STATION.
ORDER BY LENGTH(CITY) ASC, CITY ASC LIMIT 1)
UNION.
(SELECT CITY, LENGTH(CITY)
FROM STATION.
ORDER BY.

What is SQL limit?

The SQL LIMIT statement restricts how many rows a query returns. A LIMIT statement appears at the end of a query, after any ORDER BY statements. There is a built-in SQL function that allows you to perform this action: SQL LIMIT. Limit allows you to limit the number of records a query to a certain amount.

How do I get max name length in SQL?

if we choose Oracle , then this query does not work in hacker rank.
This query is for MS SQL Server and won’t work with oracle.
For MySql: SELECT CITY, LENGTH(CITY) as LEN FROM STATION ORDER BY LEN ASC, CITY ASC LIMIT 1; SELECT CITY, LENGTH(CITY) as LEN FROM STATION ORDER BY LEN DESC, CITY ASC LIMIT 1;

How do I find the length of a column in MySQL?

MySQL CHAR_LENGTH() returns the length (how many characters are there) of a given string. The function simply counts the number characters and ignore whether the character(s) are single-byte or multi-byte.

What is SQL LIMIT?

What is length in SQL?

The SQL LENGTH function returns the number of characters in a string. The LENGTH function is available in every relational database systems. It returns NULL if the input string is NULL . The number of characters is the same as the number of bytes for the ASCII strings.

Return the length of the string, in bytes:

SELECT LENGTH("SQL Tutorial") AS LengthOfString;

Try it Yourself »

The LENGTH() function returns the length of a string (in bytes).

Syntax

LENGTH(string)

Parameter	Description
string	Required. The string to count the length for

Return the length of the text in the "CustomerName" column, in bytes:

SELECT LENGTH(CustomerName) AS LengthOfName
FROM Customers;

Try it Yourself »

The LEN() function returns the length of a string.

Note: Trailing spaces at the end of the string is not included when calculating the length. However, leading spaces at the start of the string is included when calculating the length.

Tip: Also look at the DATALENGTH() function.

Syntax

LEN(string)

Parameter	Description
string	Required. The string to return the length for. If string is NULL, it returns NULL

Works in:	SQL Server (starting with 2008), Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse

Return the length of a string (counts leading spaces, but not trailing spaces):

SELECT LEN(' W3Schools.com ');

Try it Yourself »

Return the length of a string:

SELECT LEN('2017-08');

Try it Yourself »

SELECT CITY,LENGTH(CITY) FROM STATION WHERE LENGTH(CITY) IN ( SELECT MAX(LENGTH(CITY)) FROM STATION UNION SELECT MIN(LENGTH(CITY)) FROM STATION ) ORDER BY CITY ASC; When ordered alphabetically, Let the CITY names are listed as ABC, DEF, PQRS, and WXY, with the respective lengths 3,3,4, and 3.

How do I get the length of a string column in SQL?

Well, you can use the LEN() function to find the length of a String value in SQL Server, for example, LEN(emp_name) will give you the length of values stored in the column emp_name.

Is there a length function in SQL?

You can use SQL length functions in the SELECT statement and other data manipulation statements. Length functions return the length of a column, string, or variable in bytes or characters.

How do I get maximum length of a string in SQL?

Use the built-in functions for length and max on the description column: SELECT MAX(LEN(DESC)) FROM table_name; Note that if your table is very large, there can be performance issues.

THIS IS IMPORTANT: How do I turn off automatic tuning in SQL Advisor?

How do I find the longest word in SQL?

This will return the number 14. To work out the length of the largest string in a MySQL table, combine the LENGTH() and MAX() functions together like so: SELECT MAX(LENGTH(field_to_query)) FROM table_to_query; where “field_to_query” is the fieldname you want to query and table_to_query is the table.

How do I select a length in SQL?

You can use the LEN function () to find the length of a string value in SQL Server, for example, LEN (emp_name) will give you the length stored in the emp_name string.

How do I count character length in SQL?

LEN() Function in SQL Server

LEN() function calculates the number of characters of an input string, excluding the trailing spaces. It is an expression that can be a constant, variable, or column of either character or binary data.

How do I find the length of a column in SQL Developer?

Select first_name, length(first_name) len from emp; The output would be several rows containing columns first_name and its length information.

How do I count the number of repeated characters in a string in SQL?

SQL Server: Count Number of Occurrences of a Character or Word in a String

DECLARE @tosearch VARCHAR(MAX)=’In’
SELECT (DATALENGTH(@string)-DATALENGTH(REPLACE(@string,@tosearch,”)))/DATALENGTH(@tosearch)
AS OccurrenceCount.

How many keywords are there in SQL?

SQL Keywords | Learn Top 36 Keywords in SQL with Examples.

Can we use regular expression in SQL?

The database provides a set of SQL functions that allow you to search and manipulate strings using regular expressions. You can use these functions on any datatype that holds character data such as CHAR, NCHAR, CLOB, NCLOB, NVARCHAR2, and VARCHAR2. A regular expression must be enclosed or wrapped between single quotes.

THIS IS IMPORTANT: Do I need to restart MySQL after changing my CNF?

How do I use Rownum in SQL?

You can use ROWNUM to limit the number of rows returned by a query, as in this example: SELECT * FROM employees WHERE ROWNUM

Here, we are going to see how to find the shortest and longest string from a column of a table in a database with the help of SQL queries. We will first create a database “geeks“, then we create a table “friends” with “firstName“, “lastName“, “age” columns. Then will perform our SQL query on this table to retrieve the shortest and longest string in a column.

For this article, we will be using the MS SQL Server as our database.

Use the below SQL statement to create a database called geeks:

CREATE DATABASE geeks;

Using Database :

USE geeks;

Table Definition:

We have the following Employee table in our geeks database :

CREATE TABLE friends( firstName VARCHAR(30) not NULL, lastName VARCHAR(30) not NULL, age INT NOT NULL);

You can use the below statement to query the description of the created table:

EXEC SP_COLUMNS friends;

Adding Data to Table:

Use the below statement to add data to the friends table:

INSERT INTO friends values ('Ajit','Yadav', 20), ('Ajay', 'More', 21), ('Amir', 'Jawadwala', 21), ('Zara', 'Khan', 20), ('Yogesh', 'Vaishnav', 21), ('Ashish', 'Yadav', 21), ('Govind', 'Vaishnav', 22), ('Vishal', 'Vishwakarma', 21);

To verify the contents of the table use the below statement:

SELECT * FROM friends;

Now let’s find the shortest and longest firstName from the table we have just created using char_length(), min(), and max() functions and LIMIT clause.

The shortest firstName :

Use the ow syntax to find the shortest firstName in the friends table:

SYNTAX :

SELECT TOP 1 * FROM<table_name> –Here we want only one row that’s why TOP 1 *

WHERE

len(<string_column>) =

(SELECT min(len(<string_column>)) FROM<table_name> ) ;

Example :

SELECT TOP 1 * FROM friends WHERE len(firstName) = (SELECT min(len(firstName)) FROM friends);

Output :

The row with lexicographically shortest firstName :

If there are more than one strings of the same minimum length, and we want to retrieve, lexicographically, the shortest string then can do as following:

SYNTAX :

SELECT TOP 1 * FROM<table_name> –Here we want only one row that’s why TOP 1*.

WHERE

len(<string_column>) =

(SELECTmin(len(<string_column>)) FROM <table_name> )

ORDER BY <column_name>; –In this case column_name would be firstName.

Example :

SELECT TOP 1 * FROM friends WHERE len(firstName) = (SELECT min(len(firstName)) FROM friends) ORDER BY firstname;

Output :

The row with longest firstName :

SYNTAX :

SELECT TOP 1* FROM<table_name>

WHERE

len(<string_column>) =

(SELECT max(len(<string_column>)) FROM <table_name> );

Example :

SELECT TOP 1 * FROMfriends WHERE len(firstName) = (SELECT max(len(firstName)) FROMfriends);

Output :

The row with lexicographically longest firstName :

SYNTAX :

SELECT TOP 1* FROM<table_name>

WHERE

len(<string_column>) =

(SELECT max(len(<string_column>)) from <table_name> )

ORDER BY <string_column>; –here we would order data by firstName.

Example :

SELECT TOP 1* FROM friends WHERE len(firstName) = (SELECT max(len(firstName)) FROM friends) ORDER BY firstName;

Output :

Article Tags :