How do you set row-level locks in SQL Server?

In SQL Server, you can set row-level locks using the following methods:

1. When using the SELECT statement, include the WITH (ROWLOCK) hint, for example:
2. Retrieve all the data from the table named “table_name” with a row lock activated where the column named “column_name” equals the specified value.
3. In UPDATE, DELETE, or INSERT statements, use the hint WITH (ROWLOCK), for example:
4. Update the table with a row lock on the specified column based on a condition;
   Delete from the table with a row lock based on a condition;
   Insert into the table with a row lock on the specified columns and values.
5. Wrap operation statements with transactions (BEGIN TRANSACTION and COMMIT or ROLLBACK), for example:
6. – Start a transaction;
   – Retrieve all data from table_name with a row lock where column_name equals value;
   – Update table_name with a row lock, setting column_name to value where condition is met;
   – Remove data from table_name with a row lock where condition is met;
   – Add new data into table_name with a row lock, specifying columns and values;
   – Complete the transaction.

Please note that in some cases, row-level locking may lead to performance issues as it requires consuming more system resources. Therefore, it is necessary to balance the granularity of the lock and the system’s concurrency performance when using row-level locking.