How do I SELECT data from another table in SQL?

How do I SELECT data from another table in SQL?

Example syntax to select from multiple tables:

1. SELECT p. p_id, p. cus_id, p. p_name, c1. name1, c2. name2.
2. FROM product AS p.
3. LEFT JOIN customer1 AS c1.
4. ON p. cus_id=c1. cus_id.
5. LEFT JOIN customer2 AS c2.
6. ON p. cus_id = c2. cus_id.

How do I join two tables without JOINs in SQL?

Solution 1

1. SELECT column1, column2, etc FROM table1 UNION SELECT column1, column2, etc FROM table2.
2. SELECT table1.Column1, table2.Column1 FROM table1 CROSS JOIN table2 WHERE table.Column1 = ‘Some value’
3. SELECT table1.Column1, table2.Column2 FROM table1 INNER JOIN table2 ON 1 = 1.

How to select data from multiple tables in SQL?

Below statement could be used to get data from multiple tables, so, we need to use join to get data from multiple tables. Let us take three tables, two tables of customers named Geeks1, Geeks2 and Geeks3. Example to select from multiple tables :

How to select all data from ” show tables “?

Each query must name its tables explicitly. You can’t make a table name be a variable or the result of another part of the same query. Also, all rows of a given query result must have the same columns. So the only way to select all data from all tables would be to run SHOW TABLES and then for each table named in that result, run another query.

How to select all records from one table?

All the above queries are incredibly slow on big tables. A change of strategy is needed. Here there is the code I used for a DB of mine, you can transliterate changing the fields and table names. This is the strategy: you create two implicit temporary tables and make a union of them.

Which is an example of selecting from multiple tables?

Example to select from multiple tables : Attention reader! Don’t stop learning now. Get hold of all the important CS Theory concepts for SDE interviews with the CS Theory Course at a student-friendly price and become industry ready.