SQL: Tips and Tricks

Looking to improve your SQL skills? Check out Webucator’s SQL classes.
None
  1. Forgetting your MySQL root password can be scary, but thankfully there is a way to reset it. In this brief article, we will show you how.

    Read Article

  2. In our Introduction to PHP course, students create a poetry website. For the manual, I needed to create an ER diagram for the MySQL database on a Mac. I found the following options, both of which are free:

    Read Article

  3. In SQL, you round up to the nearest integer using the CEIL or CEILING function, depending on whether you're using SQL Server, Oracle, MySQL or PostgreSQL.

    Read Article

  4. SQL Server, Oracle, MySQL and PostgreSQL each have their own way of doing string concatenation.

    Read Article

  5. You might wish to select all the columns in each row of a table in your SQL select statement. The syntax for accomplishing this task is straightforward because it does not require itemizing each column defined for the table.

    Read Article

  6. A select statement in SQL may contain one or more conditions (also known as predicates) in the where clause. A condition evaluates to true or false or unknown. The where clause must return a true value for a particular row to be selected.

    Read Article

  7. You must use at least one white space character between each keyword, table or column name in an SQL select. In addition, a semicolon is required as the statement delimiter.

    Read Article

  8. When you run a select statement the records, or rows, that are displayed are not guaranteed to be in a specific order. Usually, you will want to sort the records to make the report more meaningful. You will learn how to sort records in this topic.

    Read Article

  9. A subquery is select statement contained within an outer select statement. Two types of subqueries are available in SQL: the simple subquery and the correlated subquery. In this topic you will learn how to write each type of subquery.

    Read Article