The order in which are the SQL clauses entered into the query are quite known. However, the order of logical query processing is different than in which we enter it into the script. SQL clauses and their order in the script: SELECT FROM WHERE GROUP BY HAVING ORDER BY but SQL query is logically processed… Read More »
Loop is a repeated call of a part of a code with different parameters. Usually the code is bound to certain DML operation such as INSERT or UPDATE. We call out this cycle for predetermined number of repetitions and it can be built in SQL in different ways. We will take a look at all… Read More »
SQL Command INSERT is suitable for situations when we want to insert entries into the table. Insertion of rows can be done in multiple ways (further description below): You can insert the values that you choose (INSERT INTO … VALUES (value1, value2, …)) You can insert the values into the table using script (SELECT clause… Read More »
IDENTITY is a property in SQL Server that allows for the automatic numbering of records inserted into a table. It creates an automatic increment with unique values without the need for manual insertion of numbers into the table. This function can be utilized with numeric data types, and its typical use is for identifiers and… Read More »