You can find the codes in the DB2 Information Center. Here’s a definition of the -302 from the z/OS Information Center: THE VALUE OF INPUT VARIABLE OR PARAMETER NUMBER position-number IS INVALID OR TOO LARGE FOR THE TARGET COLUMN OR THE TARGET VALUE On Linux/Unix/Windows DB2, you’ll look under SQL Messages to find your error message. If the code is positive, … Read more
I have a problem when try to select data from a table filtering by date. For example: The Oracle Error is: Probably the source data of table is corrupted, in this case: How can i solve this problem? Can I change this dates for null? The results of this select, select * from nls_session_parameters; , is:
Simply group on both of the columns. Note: the older ANSI standard is to have all non-aggregated columns in the GROUP BY but this has changed with the idea of “functional dependency”: In relational database theory, a functional dependency is a constraint between two sets of attributes in a relation from a database. In other words, … Read more
One-to-one: Use a foreign key to the referenced table: You must also put a unique constraint on the foreign key column (addess.student_id) to prevent multiple rows in the child table (address) from relating to the same row in the referenced table (student). One-to-many: Use a foreign key on the many side of the relationship linking back … Read more
There are mainly three types of variables in MySQL: User-defined variables (prefixed with @):You can access any user-defined variable without declaring it or initializing it. If you refer to a variable that has not been initialized, it has a value of NULL and a type of string.SELECT @var_any_var_name You can initialize a variable using SET or SELECT statement:SET @start = 1, @finish = … Read more
May be this will help you.
Should you instead be setting the identity insert to on within the stored procedure? It looks like you’re setting it to on only when changing the stored procedure, not when actually calling it. Try:
Yes, something like this: As other answers have pointed out, MySQL also has the IF() function to do this using less verbose syntax. I generally try to avoid this because it is a MySQL-specific extension to SQL that isn’t generally supported elsewhere. CASE is standard SQL and is much more portable across different database engines, and I prefer to … Read more
VARCHAR is variable-length. CHAR is fixed length. If your content is a fixed size, you’ll get better performance with CHAR. See the MySQL page on CHAR and VARCHAR Types for a detailed explanation (be sure to also read the comments).
Single quotes are escaped by doubling them up, just as you’ve shown us in your example. The following SQL illustrates this functionality. I tested it on SQL Server 2008: Results