4. What is Data Manipulation Language in SQL? Using SELECT, INSERT, UPDATE, DELETE commands in MySQL
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- Опубликовано: 27 дек 2019
- Welcome to Everything Computerised. I'm CA and in this video I'll be going to explain you the Data Manipulation Language (DML) in detail and the different commands present in it.
There are 4 commands in DML. These are SELECT, INSERT, UPDATE and DELETE. I'll explain everything in detail, so watch this video till end.
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RUclips par mujhe pahla aisa video mila jo mujhe SQL command ko samjha paya. WELDONE👍
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instead of SELECT * FROM table_name;
you can use DESC table_name; or just desc table_name
DESC tableName; is used to describe a table. It lists out the columns and its characteristics like data type, keys, etc.
If you want to view rows, then you have to use SELECT only.
Hope this helps. 🙂
thank you very much,
while coding i got one message in SQL, it showed some number of warnings, it came like (no.of warnings:2), what does it mean, any idea??
That's a thing you don't need to worry about when you are learning sql..
Warnings occurs when there's a better way to do something...
For example, its better to define size in int data type, which usually we dont do when we are to learn sql..
But when we master it and use it for actual production stuff, then we consider that..
So, u can just ignore it.. softwares get updated very often, thereby obsoleting old stuff and adding new ones.. and as a student, we dont actually have to worry about minor things, until there's a considerable noticeable update..
But yes, if we are to use Mysql in our software project as a tool, then we have to look into every minor and major change!
Hope you get a clear view of this now!
🙂
@@EverythingComputerized got it crystal clear thank you for your time!!!
❤
Thanks for the info but I am a little confused because the INSERT command is present in the DQL(Data Query Language)
These are just a way to classify commands. Not a big deal though.
Hello ! how are you doing? i'd like to take some classes from you. how can i get your information please.
Its nice to hear that! But as of now I dont conduct classes! For any information in future, I'll update it on my channel!
Link of video for select command in detail i havnt find in list
Actually, I made only till TCL.
I'll make remaining videos soon.
Thank you so much for being with us.
Select command with clauses I can't find it
I haven't posted it yet. I'll be posting soon. ❤
Can you please tell me how to source SQL file in MySQL 8?
Are u asking about importing an existing sql database file?
@@EverythingComputerized yes please
Hope this helps
dev.mysql.com/doc/refman/8.0/en/mysql-batch-commands.html
If i want to select only the contrys that have the population grater thene 30M
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Quotations mark sirf text ke liye lagega
Yes.. I've explained in the vdo..
Infact, only single quotations are supported in most DBMS.
Example - 'Everything Computerized'