Thank you sir for wonderful explanation, It was very clear and anyone who watches the video can easily understand the concept It helped solve one of major obstacle in sql
Can't believe this only has 752 views when the content is so good. Thank you so much, this is waaaay clearer than what I was learning in school! Sharing it with my classmates!
I think learning stuff on TH-cam must be considered formal learning and I should be able to add that I know something I learnt from a TH-cam tutorial on my resume.👌😂
Glad this video helped. The same sequence can be applied to more tables in a 'stacking' configuration. The key is to remember that you are taking data from a table to create its own virtual table that is used by another join statement. If there are a lot of joins to stacked, it may be due to a poor database design. Here is a link that may help you understand this process: codingstatus.com/sql-join-4-tables/
Can someone help me? at 5:25 he creates a - function next to select that corresponds to the block of code. How do I incorporate that? At the moment I can only answer 1 query.
At the point in the video more SQL statements are being used, not a function. Here is another video with an overview of SQL Statements th-cam.com/video/jWX78wsJMK0/w-d-xo.html
thanks for your commitment and i would like to ask a question. which is when i execute exact same command(esp. the first one) it only fetches the column names only.
Thx you Larry this is definetly getting me in the rigte direction, but im trying to join for tabels its very hard, to get them connected or maybe i just need to improve myself, thx you anyway :)
It may not be you. Writing good SQL statements is dependent upon having a well designed database. The better the design the easier it is to retrieve the data. Checkout my video on using JOIN statements: th-cam.com/video/d3e0TtPswN0/w-d-xo.html
What about performance if you are using where conditions and join conditions? We know joins performance is good compare to where condition. Please let us clarify.
in my case, I have 12 tables and I don't know how to join these tables. it looks simple but it is also complicated. I hope you can help me with this, anyway you did a great job keep it up sir ! thanks
I have a doubt. I have table with two fields, one field is array in table 1 uID | Contact 2 | 1221,1223 3 | 1123 Now value of 1221 and 1223 are in table Two. I want a query to join table 1 and table 2 using array of field2
Not sure what it is you need to do. A JOIN is based upon joining tables based upon a the data in a common field (normally a primary key and foreign key). This creates a 'virtual table'. separate
I am trying to pull data from three tables but running into a relation issues. Table1: Customer Table. Table 2: Invoice Table Table 3: Invoice Detail Table On table 1 the customer number column is "BPCNUM_0" On Table 2: The customer number column is "BPR_0" On Table 3: The customer number column is "BPCINV_0" Any idea how I can connect them to pull the data?
Please I have a few questions which I need help with. For these I have the tables ready but I am not sure if my queries are right. All the tables that I need are in section 1 which are done and completed. But for the queries from these tables are so confusing. I want to show you what I have done could you please show me if they are right . Please reply me if you can help me. I will send you all the queries I have done in the morning if you are ready to help me. Thank you God bless you. Kind regards Arslan
The demonstration in the video is for simple SELECT statements for use with mulitiple tables. When writing a query (SELECT statement) always work in reverse. Start with what data you would like to see as the result of the data. Then identify what table(s) this data will come from. This works for most queries in a well defined database. However, evaluate if this data and the tables they are in will need other types of Joins, Unions, or Sub Select statements from which to take the data from. Here is a link that I found that may help provide further information: www.essentialsql.com/a-case-study-on-how-to-use-joins-subqueries-and-unions-to-combine-data-in-sql/
Awesome tutorial, crystal clear and concise. Thank you for the tutorial, specially for the trick to identify the matching column keys from the explorer windows and for the link to EssentialSQL with an interesting query. Kris Wenzil is a phenomenal SQL instructor
i have a ques that we create one database and in one database we can create only one table . how ur database productorder included soo many tables ...???
One possible reason is you may not have permission to create tables in the database management system you are using. Check that out. If you have authority to create tables, you can use the tools in the database management system software, or you can write CREATE statements. docs.microsoft.com/en-us/sql/relational-databases/tables/create-tables-database-engine?view=sql-server-ver15
Description There are 2 datasets present in the file. Data 1 and Data 2 The primary key for both data1 and data2 is Order Id + Product ID combination (i.e. the individual datasets do not have any duplicate on this combination) Provide solution and approach for the following: How to identify the Records (Order ID + Product ID combination) present in data1 but missing in data2 (Specify the number of records missing in your answer) How to identify the Records (Order ID + Product ID combination) missing in data1 but present in data2 (Specify the number of records missing in your answer) Find the Sum of the total Qty of Records missing in data1 but present in data2 Find the total number of unique records (Order ID + Product ID combination) present in the combined dataset of data1 and data2 Allowed Tools SQL
Kind of....It is all about what data is needed in the relational database. A 'user defined column' is often a column in a relational database table where the user can enter any data they would like, as long it is of the correct datatype for the column. In a relational database management system, the importance is to collect data that can be queried to provide information. This then relates to collecting facts, such as name, address, income, favorite color, etc. There are times when data associated with an entity may not be easily defined, such as comments, opinions, analysis, etc. The data to be input to this column would not be easily defined answers are what can be considered a 'user defined column'.
Kind of.... Keep in mind that UPDATE and DELETE have their own syntax requirements. Here is an example I found from someone else to consider. stackoverflow.com/questions/2044467/how-to-update-two-tables-in-one-statement-in-sql-server-2005
![MATLAB: about matrix in Matlab Episode (3) part [1]](http://i.ytimg.com/vi/s7uS8PxzjUY/mqdefault.jpg)
This is the first link out of about twenty different pages that actually helped me solve my issue.
Can you select the primary id itself?
Thank you for the simplicity.
Thank you sir for wonderful explanation, It was very clear and anyone who watches the video can
easily understand the concept
It helped solve one of major obstacle in sql
You really saved my behind with this video
Can't believe this only has 752 views when the content is so good. Thank you so much, this is waaaay clearer than what I was learning in school! Sharing it with my classmates!
not 752 views anymore
I think learning stuff on TH-cam must be considered formal learning and I should be able to add that I know something I learnt from a TH-cam tutorial on my resume.👌😂
thank you very much for this video, i was stuck at one query ,and searched many videos and finally find accurate concept.
I’m going to give to a try when I get to work 👍🏾👍🏾👍🏾Thanks buddy!
Thanks Larry
good explanation very useful, but can you explain same as well as with 3 or more tables
Glad this video helped. The same sequence can be applied to more tables in a 'stacking' configuration. The key is to remember that you are taking data from a table to create its own virtual table that is used by another join statement. If there are a lot of joins to stacked, it may be due to a poor database design. Here is a link that may help you understand this process: codingstatus.com/sql-join-4-tables/
Thank you Larry! This content was really useful!
Thank you so much for this, it was really informative and helpful
You are my hero
awesome keep going larry we need you, searched everywhere got a good explanation here. Eggactly what I need \m/ a 2016 video helping in 2021
Same here. People should do more tutorials on DML, bcos thats the core of having to learn sql
Thank you man, you're a Gentleman and a scholar!
Just in time learning. Thanks!
Can someone help me? at 5:25 he creates a - function next to select that corresponds to the block of code. How do I incorporate that? At the moment I can only answer 1 query.
At the point in the video more SQL statements are being used, not a function. Here is another video with an overview of SQL Statements th-cam.com/video/jWX78wsJMK0/w-d-xo.html
Thanks, actually helped me so much.
thanks for your commitment and i would like to ask a question. which is when i execute exact same command(esp. the first one) it only fetches the column names only.
Data has to be in the table to be able to obtain anything more than the column names. Run some INSERT INTO statements to insert data into the tables.
Thx you Larry this is definetly getting me in the rigte direction, but im trying to join for tabels its very hard, to get them connected or maybe i just need to improve myself, thx you anyway :)
It may not be you. Writing good SQL statements is dependent upon having a well designed database. The better the design the easier it is to retrieve the data. Checkout my video on using JOIN statements: th-cam.com/video/d3e0TtPswN0/w-d-xo.html
@@LarryDomine i will I agree I had to rework my dB and It fixed it all 😁 so now I am hammered, the problem got solved
What about performance if you are using where conditions and join conditions?
We know joins performance is good compare to where condition.
Please let us clarify.
in my case, I have 12 tables and I don't know how to join these tables.
it looks simple but it is also complicated. I hope you can help me with this, anyway you did a great job keep it up sir !
thanks
you have to select your data and then when using the FROM query you type in the tables like this: FROM table 1, table 2, table 3 etc.
starts at 4:05
I have a doubt. I have table with two fields, one field is array in table 1
uID | Contact
2 | 1221,1223
3 | 1123
Now value of 1221 and 1223 are in table Two. I want a query to join table 1 and table 2 using array of field2
Not sure what it is you need to do. A JOIN is based upon joining tables based upon a the data in a common field (normally a primary key and foreign key). This creates a 'virtual table'. separate
Here is a link with more information: dataschool.com/how-to-teach-people-sql/sql-join-types-explained-visually/
brilliantly explained sir
You're a beast this is exactly what I needed!!
Good video
Thanks man I was wondering why my query was taking so long.
THANK YOU, very helpful and nicely explained.
You are a lifesaver thanky ou!!!!
I am trying to pull data from three tables but running into a relation issues.
Table1: Customer Table.
Table 2: Invoice Table
Table 3: Invoice Detail Table
On table 1 the customer number column is "BPCNUM_0"
On Table 2: The customer number column is "BPR_0"
On Table 3: The customer number column is "BPCINV_0"
Any idea how I can connect them to pull the data?
how enable ssms to see two result tables in the same windows
1. Select * from
2. Select * from
Highlight both and execute.
Please I have a few questions which I need help with.
For these I have the tables ready but I am not sure if my queries are right. All the tables that I need are in section 1 which are done and completed. But for the queries from these tables are so confusing. I want to show you what I have done could you please show me if they are right . Please reply me if you can help me. I will send you all the queries I have done in the morning if you are ready to help me. Thank you
God bless you.
Kind regards
Arslan
The demonstration in the video is for simple SELECT statements for use with mulitiple tables. When writing a query (SELECT statement) always work in reverse. Start with what data you would like to see as the result of the data. Then identify what table(s) this data will come from. This works for most queries in a well defined database. However, evaluate if this data and the tables they are in will need other types of Joins, Unions, or Sub Select statements from which to take the data from. Here is a link that I found that may help provide further information: www.essentialsql.com/a-case-study-on-how-to-use-joins-subqueries-and-unions-to-combine-data-in-sql/
Awesome tutorial, crystal clear and concise. Thank you for the tutorial, specially for the trick to identify the matching column keys from the explorer windows and for the link to EssentialSQL with an interesting query. Kris Wenzil is a phenomenal SQL instructor
Great video! Really informative
i have a ques that we create one database and in one database we can create only one table . how ur database productorder included soo many tables ...???
One possible reason is you may not have permission to create tables in the database management system you are using. Check that out.
If you have authority to create tables, you can use the tools in the database management system software, or you can write CREATE statements.
docs.microsoft.com/en-us/sql/relational-databases/tables/create-tables-database-engine?view=sql-server-ver15
thanks, this helped me a lot
Thank you, very useful
Can we use IN operator by using two tables
Yes
Thanks sir.good explained
Description
There are 2 datasets present in the file. Data 1 and Data 2
The primary key for both data1 and data2 is Order Id + Product ID combination (i.e. the individual datasets do not have any duplicate on this combination)
Provide solution and approach for the following:
How to identify the Records (Order ID + Product ID combination) present in data1 but missing in data2 (Specify the number of records missing in your answer)
How to identify the Records (Order ID + Product ID combination) missing in data1 but present in data2 (Specify the number of records missing in your answer)
Find the Sum of the total Qty of Records missing in data1 but present in data2
Find the total number of unique records (Order ID + Product ID combination) present in the combined dataset of data1 and data2
Allowed Tools SQL
how do you create a new table from that I tried Create Table tablename AS but it did not work
is it possible to give a user defined column in jdbc?
Kind of....It is all about what data is needed in the relational database.
A 'user defined column' is often a column in a relational database table where the user can enter any data they would like, as long it is of the correct datatype for the column.
In a relational database management system, the importance is to collect data that can be queried to provide information. This then relates to collecting facts, such as name, address, income, favorite color, etc.
There are times when data associated with an entity may not be easily defined, such as comments, opinions, analysis, etc. The data to be input to this column would not be easily defined answers are what can be considered a 'user defined column'.
Can this method be applied to update and delete data from multiple tables?
Kind of.... Keep in mind that UPDATE and DELETE have their own syntax requirements. Here is an example I found from someone else to consider. stackoverflow.com/questions/2044467/how-to-update-two-tables-in-one-statement-in-sql-server-2005
more videos like this
Larry do you still have visibility over these comments
Thank you...
why would you force 1080p ??
Tysm☺️
hello b