What SQL statement to use to display all the records in the teachers table?

SELECT statement uses * character to retrieve all records from a table, for all the columns. The above query will show all the records of student table, that means it will show complete dataset of the table.

What is query in SQL explain with example?

A query is a request for data or information from a database table or combination of tables. This data may be generated as results returned by Structured Query Language (SQL) or as pictorials, graphs or complex results, e.g., trend analyses from data-mining tools.

What is the query to find the total grade points earned by the student with ID 12345?

Find the total grade-points earned by the student with ID 12345, across all courses taken by the student. select sum(credits * points) from (takes ,course, grade_points where takes. grade=grade_points.

How do you explain SQL queries?

The EXPLAIN keyword is used throughout various SQL databases and provides information about how your SQL database executes a query. In MySQL, EXPLAIN can be used in front of a query beginning with SELECT , INSERT , DELETE , REPLACE , and UPDATE .

How do you write a query to display all records?

To display all records and all fields:

1. Open a table or query in Query Design view.
2. Click the down-arrow in the first field on the Field row and then select the tablename. * option.
3. Click the Run button. Access retrieves all of the fields and records for the table and displays them in Datasheet view.

How do I display the contents of a table in SQL?

To view table data:

1. In SQL Developer, search for a table as described in “Viewing Tables”.
2. Select the table that contains the data.
3. In the object pane, click the Data subtab.
4. (Optional) Click a column name to sort the data by that column.
5. (Optional) Click the SQL subtab to view the SQL statement that defines the table.

What is the query to find the total grade point?

Here’s how you calculate GPA: Get the average grade for each course. Multiply each average by the number of credit hours in said course. Add the results from 2.

How does MySQL query work?

When you issue a query, mysql sends it to the server for execution and displays the results, then prints another mysql> prompt to indicate that it is ready for another query. mysql displays query output in tabular form (rows and columns). The first row contains labels for the columns.

How do I find MySQL query plan?

To view a visual explain execution plan, execute your query from the SQL editor and then select Execution Plan within the query results tab. The execution plan defaults to Visual Explain , but it also includes a Tabular Explain view that is similar to what you see when executing EXPLAIN in the MySQL client.

How to write an Easy SQL query?

Writing SQL Queries Easy Steps : 1 From 2 Join 3 Where 4 Group By 5 Having 6 Select 7 Distinct 8 Order By. Scenario 1 : I want to Fetch the Employees Who’s Name Start with R and Salary is greater than 700000.

What are the rules for formatting a query?

Some of the rules for formatting a query are given below: Put each statement in the query in a new line. Put SQL keywords in the query in uppercase. Use CamelCase capitalization in the query and avoid underscore (Write ProductName and not Product_Name).

How to retrieve course data from registration table?

Your requirement is to write a query around course_id,course_name and fee . Now lets find those columns in the table and we can see we have all three columns in course table and course_id in registration table itself. We have got a common column in course_id on which we can apply inner join to retrieve data.

What SQL operations can I see results for?

Depending on your version of SQL you’ll be able to see results for the following operations (thank you Aaron Bertrand for previously itemizing these): Various DBCC operations (SHRINKFILE, SHRINKDATABASE, CHECKDB, CHECKTABLE…)