So, someone had stored thousands of SSN numbers in a table but now they have an issue because some of them are incomplete or are not correctly formatted. Thank you to blog.sqlauthority.com and little creativity I have come up with a SQL script that fixes this issue. Here is the T/SQL script:
This article explains the base functionality and uses of the LEFT, RIGHT, SUBSTRING and CHARINDEX functions in SQL. Samples script: Sample Results: Variable Data Results ——————– HELLO WORLD RIGHT Results ————- RLD LEFT Results ———— HEL CHARINDEX Results —————– 6 SUBSTRING Results —————– LO WO Combined Results ——————– HELLO
The following instructions are supposed to return the same results, but sometimes the results can be different. The reason is that SERVERPROPERTY automatically reports changes in the network name of the computer, while @@SERVERNAME don’t. SELECT CONVERT(sysname, SERVERPROPERTY(N’servername’)) GO SELECT @@SERVERNAME When they are run on the default instance they return just the server name, but when run over a named instance they return the server name in the following format: servername/instancename.
Find how many tables in database AdventureWorks have column name like ‘EmployeeID’.
In recent times I have seen a developer writing a cursor to update a table. When asked the reason was he had no idea how to use multiple tables with the help of the JOIN clause in the UPDATE statement. However, the easiest and the most clean way is to use JOIN clause in the UPDATE statement and use multiple tables in the UPDATE statement and do the task. Let us see the following example. We have two tables Table 1…
This quick reference introduces you a more flexible way to delete data from multiple tables by using INNER JOIN or LEFT JOIN clause in the DELETE statement. MySQL DELETE JOIN with INNER JOIN Syntax MySQL DELETE JOIN with INNER JOIN Example MySQL DELETE JOIN with LEFT JOIN Example
Concatenating string is one of the most common tasks in SQL Server and every developer has to come across it. We have to concat the string when we have to see the display full name of the person by first name and last name. Here are some samples:
Following script are very useful to know all the constraint in the database. I use this many times to check the foreign key and primary key constraint in database. This is simple but useful script from my personal archive.
MySQL TRIM() function returns a string after removing all prefixes or suffixes from the given string. Syntax TRIM( str) Arguments Name Description BOTH Indicates that prefixes from both left and right are to be removed. LEADING Indicates that only leading prefixes are to be removed. TRAILING Indicates that only trailing prefixes are to be removed. remstr The string to be removed. FROM Keyword str The actual string from where remstr is to…
