MySQL – UPDATE query based on SELECT Query
You can actually do this one of two ways: MySQL update join syntax: ANSI SQL syntax: Pick whichever one seems most natural to you.
Database
MySQL Error 1264: out of range value for column
The value 3172978990 is greater than 2147483647 – the maximum value for INT – hence the error. MySQL integer types and their ranges are listed here. Also note that the (10) in INT(10) does not define the “size” of an integer. It specifies the display width of the column. This information is advisory only. To fix the error, change your datatype to VARCHAR. Phone and … Read more
Algebra Relational sql GROUP BY SORT BY ORDER BY
Neither is possible in relational algebra but people have been creating some “extensions” for these operations (Note: in the original text, part of the text is written as subscript). GROUP BY, According to the book Fundamentals of Database Systems (Elmasri, Navathe 2011 6th ed): Another type of request that cannot be expressed in the basic … Read more
mysql: SOURCE error 2?
Assuming you mean that you are trying to use the source command in order to execute SQL statements from a text file, the error number given appears to be passed through from the POSIX layer. Therefore, using this resource, we can deduce that the error value of 2 means “no such file or directory”. In short, you got the path … Read more
“ORA-01438: value larger than specified precision allowed for this column” when inserting 3
You can’t update with a number greater than 1 for datatype number(2,2) is because, the first parameter is the total number of digits in the number and the second one (.i.e 2 here) is the number of digits in decimal part. I guess you can insert or update data < 1. i.e. 0.12, 0.95 etc. Please check NUMBER … Read more
How to run a SQL query on an Excel table?
There are many fine ways to get this done, which others have already suggestioned. Following along the “get Excel data via SQL track”, here are some pointers. Excel has the “Data Connection Wizard” which allows you to import or link from another data source or even within the very same Excel file. As part of Microsoft Office … Read more
Search for all occurrences of a string in a mysql database
A simple solution would be doing something like this:
missing FROM-clause entry for table
You typically only use an alias for a table name when you need to prefix a column with the table name due to duplicate column names in the joined tables and the table name is long or when the table is joined to itself. In your case you use an alias for VCustomer but only use it … Read more
How can I loop through all rows of a table? (MySQL)
Since the suggestion of a loop implies the request for a procedure type solution. Here is mine. Any query which works on any single record taken from a table can be wrapped in a procedure to make it run through each row of a table like so: First delete any existing procedure with the same … Read more
How do I do multiple CASE WHEN conditions using SQL Server 2008?
There are two formats of case expression. You can do CASE with many WHEN as; Or a Simple CASE expression Or CASE within CASE as;