For MySQL 5.0.3 and higher, you can use BIT. The manual says: As of MySQL 5.0.3, the BIT data type is used to store bit-field values. A type of BIT(M) enables storage of M-bit values. M can range from 1 to 64. Otherwise, according to the MySQL manual you can use BOOL or BOOLEAN, which are at the moment … Read more
The user and password are DEFINITELY incorrect. Oracle 11g credentials are case sensitive. Try ALTER SYSTEM SET SEC_CASE_SENSITIVE_LOGON = FALSE; and alter password. http://oracle-base.com/articles/11g/case-sensitive-passwords-11gr1.php
There are several ways that you can transform data from multiple rows into columns. Using PIVOT In SQL Server you can use the PIVOT function to transform the data from rows to columns: See Demo. Pivot with unknown number of columnnames If you have an unknown number of columnnames that you want to transpose, then you can use dynamic SQL: See Demo. Using … Read more
It may be easier to check if the connection and re-establish it if needed. See PHP:mysqli_ping for info on that.
Group By X means put all those with the same value for X in the one group. Group By X, Y means put all those with the same values for both X and Y in the one group. To illustrate using an example, let’s say we have the following table, to do with who is attending what subject at … Read more
In your table dbo.Sup_Item_Cat, it has a foreign key reference to another table. The way a FK works is it cannot have a value in that column that is not also in the primary key column of the referenced table. If you have SQL Server Management Studio, open it up and sp_help ‘dbo.Sup_Item_Cat‘. See which column that FK … Read more
I think the main reason is for data integrity. If you have a relationship between two tables invoice and invoice_item. You won’t be able to add an invoice item that does not related to an invoice. This is what you want! It’s called referential integrity. It can get pretty messy in your database if you don’t have … Read more
Use sp_rename See: SQL SERVER – How to Rename a Column Name or Table Name Documentation: sp_rename (Transact-SQL) For your case it would be: Remember to use single quotes to enclose your values.
Basics SELECTing columns from a table Aggregates Part 1: COUNT, SUM, MAX/MIN Aggregates Part 2: DISTINCT, GROUP BY, HAVING Intermediate JOINs, ANSI-89 and ANSI-92 syntax UNION vs UNION ALL NULL handling: COALESCE & Native NULL handling Subqueries: IN, EXISTS, and inline views Subqueries: Correlated WITH syntax: Subquery Factoring/CTE Views Advanced Topics Functions, Stored Procedures, Packages Pivoting data: CASE & PIVOT syntax Hierarchical Queries Cursors: Implicit and Explicit Triggers Dynamic … Read more
You can’t concatenate an int to a string. Instead of: You need: To help illustrate what’s happening here. Let’s say @RowTo = 5. In order to build that into a string (even if ultimately it will be a number), I need to convert it. But as you can see, the number is still treated as … Read more