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PostgreSQL LENGTH() function - w3resource
SQL Query to Find Shortest & Longest String From a Column of a Table - GeeksforGeeks
SQL-SERVER: how to get the maximum length of a variable of VARCHAR help - Database Administrators Stack Exchange
length sql | length function in sql - sql - sql tutorial - learn sql - By Microsoft Awarded MVP - Learn in 30sec | wikitechy
sql - Is it faster to check if length = 0 than to compare it to an empty string? - Stack Overflow
SQL LEN() - SqlSkull
SQL LENGTH function - Get the Number of Characters In a String
LEN function in MSSQL and it's equivalent in MySQL
Substring() in SQL Server: How to use Function with Example
Commonly Used Built In String Functions In SQL Server
SDU Tools: Calculate string length in SQL Server T-SQL - The Bit Bucket
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Oracle String LENGTH() Function - javatpoint
SQL Server SUBSTRING Function with Examples
SQL String Length Function
SQL LEN() function(combine several special functions)
