Oldie but goodie: “There are two types of people: 1. That’sĬompletely up to you and the changes you’re making.
You could backup the entire database or only 1 table. Tip: If you expect major changes in your databases, either in structure, either dataĬhanges, creating a backup is always a good idea. I prefer to backup the database before these changes. Using scripts is usually related to making significant changes in the database. It’s desired that you use scripts, especially when you’re deploying a new version and you want to keep current data Therefore, you could change the database structure (CREATE, ALTER, DROP objects) and/or change the data These commands could be any combination of DDL (Data Definition Language) or DML (Data Manipulation Language)Ĭommands. The only thing that is specific is that commands in such scripts are SQL commands. Please notice that the script is not compiled).
Sql script summarize tool series#
In programming, scripts are the series of commands (sequence of instructions) or a program that will be executed inĪnother program rather than by the computer processor (compiled programs are executed by computer processor –> But before we do that, let’s see what the SQL script really is.
Sql script summarize tool how to#
The only thing we miss is how to get there. Now we know where we are and where we want to be. Basically, they give the purpose to the whole data model. While everything in databases is closely related to our business, these 4 new tables are much more specific than theĢ ones we already had. These 4 tables are much more than just a place to store the data in the way we did that with counties and cities. Table employees, customers and call outcomes are related call – Contains details about calls employees had with customers.For example, call outcome could be “Call successful – They are specific because values stored here almost never change and business logic is often directly related to these values. call_outcome – Is a list of all possible ways any call could finish.customer – Contains a list of all customers we’ve worked with.employee – Contains a list of all employees in our company.Now we have the data model with 6 tables. Such tables are the country, city, employee/user/account, customer/client, task, contact. The ones storing data that are used often and are being part of almost any business process. Tip: You’ll often find some tables repeating in very different data models.While we’ll need these two tables to store countries and cities, we’ll add a few more tables. This model served its’ purpose so far, but now we’re ready to move to the next level and we need something more complex. I guess you want to have something more than just a list of countries and Unless our database serves only that purpose, this model is not too “smart”. Serve as storage where we’ll store data related to countries in cities. In the picture below, you can see our current data model.
This is not specific forĭatabases only, but for almost any process – you should give yourself some time to think about the problem before Sit back, relax, and get ready to learnīefore we do anything else, we’ll describe what we have and what we want to achieve. Today we’ll stand up against that injustice.
We actually used them in this series so far, but we haven’t pointed I can hardly imagine making any complex database changes without using SQL scripts.
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