#Sqlectron two tables syntax code#The code below would return the top 50 results from the customers table: SELECT TOP 50 * FROM customers SELECT TOP only returns the top x number or percent from a table. SELECT INTO copies the specified data from one table into another. The code below would return only rows with a unique name from the customers table. SELECT DISTINCT only returns data that is distinct - in other words, if there are duplicate records, it will return only one copy of each. SELECT used with an asterisk (*) will return all of the columns in the table we’re querying. It allows you to define what data you want your query to return.įor example, in the code below, we’re selecting a column called name from a table called customers. You’ll use it pretty much every time you query data with SQL. SELECT is probably the most commonly-used SQL statement. Here are just a few of our beginner SQL courses: Whether you’re a beginner trying to get job-ready or a seasoned developer looking to stay sharp, there’s a SQL course for you. If you’re on a journey to learn SQL and you’ve been frustrated by the lack of structure or the dull curriculum composed of Google searches, then you may like Dataquest’s interactive SQL courses. SELECT TOP is within the SELECT category). As with any language and especially when you are a beginner, it can be useful to have a list of common SQL commands and operators in one place to refer to whenever you need it - we’d like to be that place for you!īelow is a comprehensive list of SQL commands, organized by the top-level of each (e.g. To get a data job in 2021, you are going to need to learn SQL. FebruSQL Commands: The Complete List (w/ Examples)
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