SQL Server Maintenance Tips
Jan 22, · I have created a windows phone application (for Motorola MC55/65 phone). I use SQL Server Merge Replication to pull the master data from SQL Server database and store the data in a SQL Server Compact database file (lovemedat.com) I am stating my problem below: 1. SQL Server () Merge Replication is not working over phone network (using SIM. SQL Server previous versions documentation. Find links to Help for older versions of the SQL Server products and services.
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Now available! Stream, store, and analyze data while it is in motion or at rest, whether online of offline. Gain insights from all your data by querying across relational, non-relational, structured, and unstructured data, for a complete picture of your business using SQL Server swl Apache Spark built in. Get the flexibility to use the language and platform of your choice with open source support. Take advantage of breakthrough scalability and performance to improve the stability and response time of your database—without making app changes.
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Stay a step ahead using built-in features for data classification, data protection, and monitoring and alerts [ 1 ]. Benefit from a consistent, unified experience across your entire SQL portfolio and a full range of deployment options from edge to cloud.
Manage your big data environment more easily with Big Data Clusters. Easily deploy your database using Linux containers on a Kubernetes cluster. Get the resources and information you need to start your SQL Server migration. The intelligent query processing feature has increased the speed and tk power of our business. We can analyze cancer research data coming from dozens of different data sources, mine interesting graph features, and carry out analysis at scale. We get a lot from SQL Server—reliability, scalability, integration, and agility.
Our analysts and expert users can continue to interact with the core data using the tools and languages they are comfortable with. Learn more about Azure SQL. Apply intelligence across all your data with SQL Server Whether your data is structured or unstructured, query and analyze it using the data platform with industry-leading performance and security. Watch video.
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Choose your language and platform Get the flexibility to use the language and platform of your choice with open source support. Rely on industry-leading performance Take advantage of breakthrough scalability and performance to improve how to set up a refugium tank stability hhow response time of your database—without making app how long do dishwashers take to wash dishes. Trust nine years of proven security leadership Achieve your security and compliance ot using the database rated as least vulnerable over the last nine years.
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SQL Server 2019: Your modern data platform
Transform your business with a unified data platform. SQL Server comes with Apache Spark and Hadoop Distributed File System (HDFS) for intelligence over all your data. SQL Server Version Full load Ongoing replication (CDC) , , R2, , , , , Enterprise. Standard. Workgroup. Developer. Web. Enterprise. SQL Server (9.x) 9: 90, SQL Server (8.x) This does not have an impact on the functionality of replication. Upgrading to later service packs and versions of SQL Server will result in the compatibility level of the distribution database to be increased to match that of the master database.
How to create a database in SQL Server? A database is an organized file of data. It is a collection of schemas, tables, procedures, code functions, and other objects. Various query languages are used to access and manipulate data. In SQL Server, a table is an object that stores data in a tabular columns and rows form. Right-click on Databases, select New Database and follow the wizard steps. What is SQL? The smallest unit of execution in SQL is a query.
A SQL query is used to select, update, and delete data. Here is an example of a SQL query and the result in an Oracle database. Here we can see our database is created. Learn more here: What is SQL? Control Statements are elements in a program that controls the flow of program execution.
The syntax of control statements is similar to regular English and is very similar to the choices that we make every day. Alternatively, RDBMS can also store vast amounts of historical data, which can later be analyzed or "mined".
Application-specific schema: The RDBMS is configured on a per-application basis and a unique schema exists to support each application. Complex data models. The relational nature of the RDBMS makes it suitable for handling sophisticated, complex data models that require many tables, foreign key values, complex join operations, and so on. This includes rollback operations, referential integrity, and transaction-oriented operations. What is a database table? Database table: The table contains records in the form of rows and columns.
A permanent table is created in the database you specify and remains in the database permanently until you delete it. How do you create a table in SQL? How to delete a table in SQL Server? What are relationships in SQL Server database? Relationships are created by linking the column in one table with the column in another table. There are four different types of relationships that can be created.
Look at the following diagram: Many to Many Relationship The third table acts as a bridge between the tables that want to establish a Many-to-Many relationship. The bridge table stores the common information between Many-to-Many relationship tables. Have a look at the following diagram: Click on the following link to read further: Database Table Relationship What is the primary key of a database?
A table column with this constraint is called the key column for the table. This constraint helps the table to make sure that the value is not repeated and also that there are no null entries. Now, this column does not allow null values and duplicate values. You can try inserting values to violate these conditions and see what happens.
A table can have only one Primary key. Multiple columns can participate in the primary key. What is a foreign key of a database? Answer: To define the relationship between two tables one is called the parent and the other one is the child table connected by columns, a foreign key constraint is used. In this constraint, the values of the child table must appear in the parent table, which means that for a foreign key, one table should point to a Primary Key in another table.
A table can have multiple foreign keys and each foreign key can have a different referenced table. What is database normalization? Database normalization is the process of organizing the fields and tables of a relational database to minimize redundancy and dependency. Normalization usually involves dividing large tables into smaller and less redundant tables and defining relationships among them.
Normalization is a bottom-up technique for database design. What are database normalization forms? Normalization is the process of organizing data into a related table. It also eliminates redundancy and increases integrity which improves the performance of the query. To normalize a database, we divide the database into tables and establish relationships between the tables.
What is a stored procedure? Stored Procedures are a precompiled set of one or more statements that are stored together in the database.
They reduce the network load because of the precompilation. We can create a Stored Procedure using the "Create proc" statement. They are a network load reducer and decrease execution time because they are precompiled. The most important use of a Stored Procedure is for security purposes. They can restrict SQL Injection. The Stored Procedure retains the state of the execution plans. What is a function in SQL Server? A function is a sequence of statements that accepts input, processes them to perform a specific task and provides the output.
The main advantage of a user-defined function is that we are not just limited to pre-defined functions. We can write our own functions for our specific needs or simplify complex SQL code. The return type of a SQL function is either a scalar value or a table. What are the different types of functions in SQL Server? A function must return a result. So that is also called a function that returns a result of a value. When we create it a function must specify a value type that will return a value.
Functions only work with select statements. Functions compile every time. Functions must return a value or result. Functions only work with input parameters. Try and catch statements are not used in functions. What is a trigger in SQL Server?
A Trigger is a Database object just like a stored procedure or we can say it is a special kind of Stored Procedure which fires when an event occurs in a database. It is a database object that is bound to a table and is executed automatically.
We cannot explicitly call any trigger. Triggers provide data integrity and used to access and check data before and after modification using DDL or DML query. Code of DML Trigger: create trigger deep on emp for insert, update, delete as print 'you can notinsert,update and delete this table i' rollback; Output: When we insert, update or delete in a table in a database then the following message appears: Click on the following link to read further: Triggers in SQL Server Why and when to use triggers?
We use a trigger when we want some event to happen automatically on certain desirable scenarios. You have a table that changes frequently, now you want to know how many times and when these changes take place. In that case you can create a trigger that will insert the desired data into another table whenever any change in the main table occurs. What are the different types of triggers? Triggers are a special type of stored procedure executed automatically based on the occurrence of a database event.
The benefits derived from triggers are based on their event-driven nature. Once created, the trigger automatically fires without user intervention based on an event in the database. DML triggers are powerful objects for maintaining database integrity and consistency. DML triggers evaluate data before it has been committed to the database.
During this evaluation, the following actions are performed. This type of trigger is useful for controlling development and production database environments. Let us create a DDL trigger now. What is a view in the database? A View is nothing but a select query with a name given to it or we can simply say a view is a Named Query.
Why do we need a view? There can be many answers to this. Some important points are: A view can combine data from multiple tables using adequate joins and while bringing it may require complex filters and calculated data to form the required result set.
From a user's point of view, all these complexities are hidden data queried from a single table. Sometimes for security purposes, access to the table, table structures, and table relationships are not given to the database user. All they have is access to a view not knowing what tables actually exist in the database.
Using the view, you can restrict the user to update only portions of the records.