Example #4 – Selecting the Number of Records Query: SELECTCOUN(*)ascountfromStudent; Output: Query: SELECTCOUN(*)ascountfromClass; Output: Other Facts about the SQL SELECT The select statement mentioned above
Example: UPDATE Intellipaat AS i1 JOIN Intellipaat AS i2 ON i1.department = i2.department SET i1.salary = i2.salary * 1.05 WHERE i1.status = 'Active' AND i2.role = 'Manager'; Select * from Intellipaat; Output: Explanation: Here, this query raises all current employees’ salaries...
Syntax: DESC[RIBE][SCHEMA].object name For example, will display the EMPLOYEE table structure i.e. columns, their data types, precision and nullable property. Print Page Previous Next Advertisements
In SQL, in order to EXCLUDE certain rows from being returned by a SELECT query, we use some restricting or excluding conditions based on some criteria. EXCLUDE conditions in SQL usually appear in the WHERE clause of the statement or in the HAVING clause of an aggregate query. Some commonly ...
1. Basic SELECT - Consider a simple database with a table named "employees" which has columns like "employee_id", "first_name", "last_name", and "salary".- To retrieve all the columns and rows from the "employees" table, we use the following SQL query:```sql SELECT FROM employees;...
The ELSE argument is optional. The example given in the introduction uses this format. Let’s take a look at some examples using theEmployeetable in theHumanResourcesschema. This query decodes the MaritalStatus column into a more elaborate description: ...
A query without a FROM clause can be used to return a single row of data containing a constant or expression. For example, to select the current day of the week: Tableless Query Example 1 SELECT DAYNAME(NOW()) AS "Today" Note A tableless query will create a result set backed by a...
Example: COALESCE(discount, base_price * 0.1) applies a discount if available, otherwise calculates a default. Conditional Joins: It provides assistance withJOINoperations, especially when certain values may be missing. Example: ON COALESCE(a.id, b.id) = b.id ensures a match even if a.id ...
For example, the following query is specified against the xml type variable. The if condition tests the value of the SQL variable (@v) inside the XQuery expression by using the sql:variable() function extension function. If the variable value is "FirstName", it returns the <FirstName> ...
ANY returns true if any conditions are met, similar to an OR. This query is the same as the ALL example above, except the ALL has been changed to ANY. The subquery still looks for all orders greater than 40, and the main query is looking for any orders returned. So, here we see ...