Update t1 Set t1.col1 = t2.col1 from Table t1 inner join Table t2 on t1.col = t2.col where Condtn

Below is MYSql Example

Update Table t1 inner join Table t2 on t1.col = t2.col Set t1.col1 = t2.col1 where Condtn

Coming to the tools available to download for a good GUI, we have very less options, MYSQL query , PHPadmin are some of them. There are some tools which can be used to migrate the tables and data from the MSSQL to MYSQL. The MYSQL migration tool is also available to migrate the tables. But iam not sure that we can also migrate the stored procedures, but when i tried to migrate a small application i totally failed to shift the stored procedures to MYSQL. I have to migrate them manually. I have to check the syntax manually for each and every line and then execute the procedure.
There are some points which we have to keep in mind while migrating the database from MSSQL to MYSQL. The MYSQL statements has to end with semi-colon , even the ending of the for loop has to closed by a semi-colon.

When we migrate the tables from MSSQL to MYSQL we do not get the perfect script which defines the primary keys and the default values. We have to turn them on manually.

So please be carefull while doing the application and choosing the database, the migration of the database is same as a small project.

wish you happy programmin

Getting the number of days in a month is quite easy because it is going to be either 30 or 31 days, with the exception of February, which can either have 28 or 29 days depending if it is a leap year or not.

• January,March,May,July,August,October,December — 31 Days
• April,June,September,November – 30 Days
• February – 28 Days (Non Leap Year), 29 (Leap Year)

Leap year should be divisible by 4, should not be divisible by 100 or should be divisible by 400.

CREATE FUNCTION [dbo].[udf_GetDaysInMonth] ( @pDate    DATETIME )
RETURNS INT
AS
BEGIN

RETURN CASE WHEN MONTH(@pDate) IN (1, 3, 5, 7, 8, 10, 12) THEN 31
WHEN MONTH(@pDate) IN (4, 6, 9, 11) THEN 30
ELSE CASE WHEN (YEAR(@pDate) % 4    = 0 AND
YEAR(@pDate) % 100 != 0) OR
(YEAR(@pDate) % 400  = 0)
THEN 29
ELSE 28
END
END

END
GO

Here’s yet another way of determining the number of days in a month without knowing if it is a leap year.  It is computed by getting the lastday of the month.

CREATE FUNCTION [dbo].[udf_GetDaysInMonth] ( @pDate    DATETIME )
RETURNS INT
AS
BEGIN
SET @pDate = @pDate - DAY(@pDate) + 1 -- Get the first date of the month
RETURN day(dateadd(dd,-1,@pDate))
END
GO

Get the number of days in month in MYSQL

select DAY(LAST_DAY('2004-02-05'))

The following tables shows the maximum sizes and numbers of various objects defined in MYSql, SQL Server.