What are stored procedures & triggers in SQL?

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What are stored procedures & triggers in SQL?

A stored procedure is a group of SQL statements that is compiled one time, and then can be executed many times. Triggers are named database objects that are implicitly fired when a triggering event occurs. The trigger action can be run before or after the triggering event.

What steps would you take to optimize a stored procedure?

Improve stored procedure performance in SQL Server

  1. Use SET NOCOUNT ON.
  2. Use fully qualified procedure name.
  3. sp_executesql instead of Execute for dynamic queries.
  4. Using IF EXISTS AND SELECT.
  5. Avoid naming user stored procedure as sp_procedurename.
  6. Use set based queries wherever possible.
  7. Keep transaction short and crisp.

Which is better trigger or stored procedure?

Stored procedures can be invoked explicitly by the user. On the other hand, trigger is a stored procedure that runs automatically when various events happen (eg update, insert, delete). Triggers are more like an event handler they run at the specific event. Trigger can not take input and they can’t return values.

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How do I create a Git database?

How to version control a database using GitHub and SQL Source…

  1. Step 1: Create a GitHub account.
  2. Step 2: Create a database repository in GitHub.
  3. Step 3: Clone your database repository to your local machine.
  4. Step 4: Install SQL Source Control.
  5. Step 5: Create a database and link it to Github.

What is difference between procedure and trigger?

Trigger and Procedure both perform a specified task on their execution. The fundamental difference between Trigger and Procedure is that the Trigger executes automatically on occurrences of an event whereas, the Procedure is executed when it is explicitly invoked.

What is the difference between function and trigger?

Function: We can call a function whenever required. Function can’t be executed because a function is not in pre-compiled form. Trigger: Trigger can be executed automatically on specified action on a table like, update, delete, or update.

How can we optimize a SQL query?

It’s vital you optimize your queries for minimum impact on database performance.

  1. Define business requirements first.
  2. SELECT fields instead of using SELECT *
  3. Avoid SELECT DISTINCT.
  4. Create joins with INNER JOIN (not WHERE)
  5. Use WHERE instead of HAVING to define filters.
  6. Use wildcards at the end of a phrase only.
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How does stored procedure improve performance?

Stored procedures improve database performance as they allow cached query plans to be reused. In the case of dynamic SQL, you will have to use parameterized queries to increase cached query plan reusability.

What is the level of creating trigger?

Row-level triggers are the most common type of triggers; they are often used in data auditing applications. Row-level trigger is identified by the FOR EACH ROW clause in the CREATE TRIGGER command. Statement-level triggers execute once for each transaction.

What is difference between function and trigger?

What are the three stages of Git?

Every project under the distributed version control system Git, goes through three stages — Modified, Staged, and Committed.

What is git SQL?

gitSQL is a *free front end GUI for scripting out SQL objects into Flat File for use with Source Control such as GIT.

Is there a way to integrate SQL in Git?

Try sql-source-control, a free and open source CLI used to get SQL into source control systems like Git. https://www.npmjs.com/package/sql-source-control

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Should you use Git for SQL Server scripts?

Here’s an example talking about using Git for SQL Server scripts. There’s GitSQL — a dedicated source control solution for PostgreSQL databases. 3. Mandatory Reviews You should have a mandatory reviewer for every merge request. This makes sure that nothing suspicious or incorrect is going to production.

How are changes made during the development process committed to Git?

All changes made during the development are committed to a local mainline and pushed to a master branch on a remote repository, using the Git Bash client. Initial database version is released to production as MyDatabase1.0 .

Does apexsql support Git as a source control system?

8 I’ve found out that ApexSQL has a tool that natively supports Git as a source control system. It comes as a SSMS add-in, and offers a wizard you can use to map database objects with the source control systems. To do that: