What does log do in SQL?

Question

SQL Server LOG() Function The LOG() function returns the natural logarithm of a specified number, or the logarithm of the number to the specified base. From SQL Server 2012, you can also change the base of the logarithm to another value by using the optional base parameter.

What are SQL logs used for?

Every SQL Server database has a transaction log that records all transactions and the database modifications made by each transaction. The transaction log is a critical component of the database. If there is a system failure, you will need that log to bring your database back to a consistent state.

How do I log a SQL query?

Procedure1From the workbench menu bar, click Window > Preferences > Database Retrieval Parameters > DB Retrieval Debug. ... 2To start logging SQL queries, click Yes.3To stop logging SQL queries, click No.4To view details of the SQL queries in the DB Retrieval Debug view, click Open Debug View, then click OK.

How does transaction log works in SQL Server?

The transaction log is an integral part of SQL Server. Every database has a transaction log that is stored within the log file that is separate from the data file. A transaction log basically records all database modifications. When a user issues an INSERT, for example, it is logged in the transaction log.

What is a log file in database?

In combination with database backups, they are used to recover the consistency of the database right up to the point in time when an error occurs. Some logs, called active or primary logs, contain transactions which have not been committed to the database. These logs are stored in the primary database log path.

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