Trouble Shooting (Object Not Found Errors, Invalid Statement Order)

p {margin: 0; padding: 0;} .ft00{font-size:18px;font-family:NimbusRomanRegular;color:#000000;} .ft01{font-size:18px;font-family:NimbusRomanBold;color:#000000;} Trouble Shooting Object Not Found Errors "Object Not Found" errors in SQL occur when a query references an object that cannot be found in the database. This typically happens when attempting to perform operations on tables, views, indexes, or other database objects that do not exist or have been renamed or removed. These errors can be caused by various reasons, and the exact error message may differ depending on the database management system being used. Examples: 1. Querying a Non-Existent Table: Attempting to select data from a table that hasn't been created or has been deleted. 2. Incorrect Schema Qualification: Using the wrong schema name when referencing an object, leading to the inability to find the object. 3. Renamed or Dropped Objects: Trying to access a table, view, or index that has been renamed or dropped from the database Invalid Statement Order In SQL, the order of statements is crucial to ensure that the queries are executed properly and return the expected results. There are certain invalid statement orders that can lead to syntax errors or unexpected behavior. Examples : 1. Invalid: FROM customers SELECT *; 2. Invalid: WHERE age > 30 SELECT name FROM employees; 3. Invalid: GROUP BY department SELECT department, COUNT() FROM employees; 4. Invalid: HAVING SUM(sales) > 1000 GROUP BY product_name SELECT product_name, SUM(sales) FROM sales_table; 5. Invalid: ORDER BY salary SELECT employee_id, name, salary FROM employees; 6. Invalid: INSERT customers (customer_id, customer_name) VALUES (1, 'John Doe');