What does SQL clause “GROUP BY 1” mean?
It means to group by the first column regardless of what it’s called. You can do the same with ORDER BY.
Database
How to export a mysql database using Command Prompt?
First check if your command line recognizes mysql command. If not go to command & type in: Then use this command to export your database: You will then be prompted for the database password. This exports the database to the path you are currently in, while executing this command Note: Here are some detailed instructions regarding both import … Read more
Error converting data type varchar to float
Try to use ISNUMERIC to handle strings which can’t be converted:
Add a column with a default value to an existing table in SQL Server
Syntax: Example: Notes: Optional Constraint Name:If you leave out CONSTRAINT D_SomeTable_SomeCol then SQL Server will autogenerate a Default-Contraint with a funny Name like: DF__SomeTa__SomeC__4FB7FEF6 Optional With-Values Statement:The WITH VALUES is only needed when your Column is Nullable and you want the Default Value used for Existing Records.If your Column is NOT NULL, then it will automatically use the Default … Read more
grabbing first row in a mysql query only
To return only one row use LIMIT 1: It doesn’t make sense to say ‘first row’ or ‘last row’ unless you have an ORDER BY clause. Assuming you add an ORDER BY clause then you can use LIMIT in the following ways: To get the first row use LIMIT 1. To get the 2nd row you can use limit with an … Read more
PCI\VEN_10EC&DEV_522A&SUBSYS_837D103C&REV_01
This is called a correlated update Assuming the join results in a key-preserved view, you could also
Oracle SQL: Update a table with data from another table
This is called a correlated update Assuming the join results in a key-preserved view, you could also
#1045 – Access denied for user ‘root’@’localhost’ (using password: YES)
The problem was I have 2 instances of Mysql installed and I didn’t know the password for both instances.Just check if port 80 is used by any of the programs. This is what I did 1.Quit Skype because it was using port 80.(Please check if port 80 is used by any other program). 2.Search for … Read more
How to insert date values into table
How can I insert into table with different input using / ,with date datatype? I’m using oracle 10g.
String or binary data would be truncated. The statement has been terminated
I have met some problem with the SQL server, this is the function I created: When I write a query to use that function like the following it getting the error String or binary data would be truncated. The statement has been terminated How can I fix this problem? This is the way I create … Read more