General MySQL Oracle SQL Server

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Using Multiple Columns in the GROUP BY Clause in SQL Server
Can Multiple Columns Be Used in GROUP BY in SQL Server? If you want to break your output into smaller groups, you can specify multiple column names or expressions in the GROUP BY clause. Output in each group must satisfy a specific combination of the expressions listed in the GROUP BY clause. The mo... 2016-10-25, 2325🔥, 0💬

Deleting Multiple Rows with One DELETE Statement in SQL Server
How To Delete Multiple Rows with One DELETE Statement in SQL Server? You can delete multiple rows from a table in the same way as deleting a single row, except that the WHERE clause will match multiple rows. The tutorial exercise below deletes 3 rows from the fyi_links table: -- view rows to be dele... 2016-10-30, 2322🔥, 0💬

Defragmenting Table Indexes in SQL Server
How To Defragment Table Indexes in SQL Server? When a table index is fragmented to a certain percentage, you need to defragment the index to maintain its performance level. There are 3 ways to defragment: 1. "ALTER INDEX index_name ON table_name REORGANIZE" - Defragmenting the specified index perfor... 2016-11-08, 2315🔥, 0💬

IN - Testing Values Returned by a Subquery in SQL Server
How To Test Values Returned by a Subquery with the IN Operator in SQL Server Transact-SQL? Normally, the comparison operator IN is used against a list of specified values as in the format of: "test_value IN (value_1, value_2, ..., value_n)". But you can also replace the list of values by a subquery ... 2017-01-21, 2314🔥, 0💬

PHP ODBC - Creating a New Table
PHP ODBC - How To Create a New Table? If you want to create a table in the database connected through a ODBC DSN, you can run the CREATE TABLE SQL statement using the odbc_exec() function, as shown in the following sample script: &lt;?php $con = odbc_connect('FYI_SQL_SERVER', 'sa','FYIcenter');#... 2024-06-03, 2313🔥, 0💬

Using Values from Other Tables in UPDATE Statements in SQL Server
How To Use Values from Other Tables in UPDATE Statements in SQL Server? If you want to update values in one table with values from another table, you can use a subquery as an expression in the SET clause. The subquery should return only one row for each row in the update table that matches the WHERE... 2016-11-02, 2311🔥, 0💬

PHP ODBC - Deleting Existing Rows in a Table
PHP ODBC - How To Delete Existing Rows in a Table? If you want to remove a row from a table, you can use the DELETE statement with a WHERE clause to identify the row. The following sample script deletes one row: &lt;?php $con = odbc_connect('FYI_SQL_SERVER', 'sa','FYIcenter');$sql = "DELETE FROM... 2024-05-05, 2309🔥, 0💬

What Is an Expression in SQL Server
What Is an Expression in SQL Server Transact-SQL? An expression is a combination of identifiers, values, and operators that SQL Server 2005 can evaluate to obtain a numeric value. A simple expression could be a constant, a function, a column name, a variable, or a subquery without any operators. Com... 2017-04-01, 2309🔥, 0💬

Getting Parts of DATETIME Values as Integers in SQL Server
How To Get Parts of DATETIME Values as Integers in SQL Server Transact-SQL? Sometimes, you want to one specific part of a DATETIME value as an integer to be used in your own date and time calculations. This can be done by using the DATEPART() function in the following format: DATENAME(datepart, date... 2017-02-14, 2309🔥, 0💬

EXISTS - Testing Subquery Results in SQL Server
How To Test Subquery Results with the EXISTS Operator in SQL Server Transact-SQL? EXISTS is a special operator used to test subquery results. EXISTS can be used in two ways: EXISTS (SELECT ...) -- Returns TRUE if the specified subquery has one or more rows returned. NOT EXISTS (SELECT ...) -- Return... 2017-01-21, 2308🔥, 0💬

Basic Features of a Trigger in SQL Server
What Are the Basic Features of a Trigger in SQL Server? Since a SQL Server trigger is a really an event handler, it has the following basic features similar to event handlers in other programming languages: Event Type - It must be declared to handle a specific event, like a DELETE event. Object Scop... 2016-10-25, 2306🔥, 0💬

Accessing a Schema Not Owned by You in SQL Server
What Happens If You Are Trying to Access a Schema Not Owned by You in SQL Server? In general, if you are trying to access an object in schema owned by another database user, you will get a "permission denied" error, unless that you have been granted access permission to that object explicitly. Here ... 2016-10-22, 2304🔥, 0💬

mssql_connect() - Connecting to Different Port Numbers
How To Connect with Different Port Numbers? You know that SQL Server could be configured to accept connections with different TCP/IP port numbers. See other tutorial collections on how to view and configure SQL Server TCP/IP protocol. If you installed SQL Server 2005 Express Edition with default set... 2024-04-14, 2299🔥, 0💬

LIKE - Matching a Pattern in a Character String in SQL Server
What To Perform Pattern Match with the LIKE Operator in SQL Server Transact-SQL? Pattern match is a very important operation for search records base on character string columns. SQL Server 2005 offers the LIKE operator to perform pattern match operations in two formats: target_string LIKE pattern --... 2017-01-21, 2299🔥, 0💬

Categories of Functions Based on Return Modes in SQL Server
How Many Categories of Functions based Their Return Modes in SQL Server Transact-SQL? SQL Server supports 2 categories of user defined functions based on their return modes: 1. Scalar-valued Functions - A function that returns a single value. Scalar-valued functions can be used in scalar expressions... 2016-12-18, 2297🔥, 0💬

Providing Column Names in INSERT Statements in SQL Server
How to provide column names in INSERT Statements in SQL Server? If you don't want to specify values for columns that have default values, or you want to specify values to columns in an order different than how they are defined, you can provide a column list in the INSERT statement. If a column is om... 2016-11-02, 2293🔥, 0💬

Security Principals Used in SQL Server 2005 in SQL Server
What Are Security Principals Used in SQL Server 2005 in SQL Server? SQL Server 2005 supports several basic security principals located at different levels: Windows-Level Principals: Windows Local Login and Windows Network Domain Login - Used to control accesses to SQL Server instances. SQL Server-Le... 2016-10-20, 2293🔥, 0💬

Commonly Used ODBC Functions in PHP
What Are Commonly Used ODBC Functions in PHP? If you look at the PHP 5 manual, you will see a group of functions listed under the ODBC Functions (Unified) section. The commonly used ODBC functions are: odbc_connect � Establish an OBDC connection. odbc_data_source � Returns information about a curren... 2024-03-17, 2292🔥, 0💬

UNION - Merging Outputs from Two Queries Together in SQL Server
How To Use UNION to Merge Outputs from Two Queries Together in SQL Server? If you have two queries that returns the same row fields, you can merge their outputs together with the UNION operator. The following tutorial exercise shows you how to use the UNION operator: SELECT * FROM fyi_links WHERE ta... 2016-10-26, 2291🔥, 0💬

PHP ODBC - Updating Existing Rows in a Table
PHP ODBC - How To Update Existing Rows in a Table? Updating existing rows in a table requires to run the UPDATE statement with a WHERE clause to identify the row. The following sample script updates one row with two new values: &lt;?php $con = odbc_connect('FYI_SQL_SERVER', 'sa','FYIcenter');$sq... 2024-05-29, 2285🔥, 0💬

Requirements on SQL Server Network Connections
What Are the Requirements on SQL Server Network Connections? By default, SQL Server 2005 Express Edition is installed only one connection protocol enabled: Shared Memory - SQL Server connection protocol for applications that are running on the same machine where the SQL Server is running. For exampl... 2024-08-06, 2284🔥, 0💬

Inserting Data into a View in SQL Server
Can You Insert Data into a View in SQL Server? Can you insert data into a view? The answer is no. But if the question is "Can you insert data into the underlying table through view?" The answer is then yes. SQL Server will allow you to insert data into the underlying table through a view with a cond... 2016-11-04, 2284🔥, 0💬

NULL Values Involved in Datetime Operations in SQL Server
What Happens If NULL Values Are Involved in Datetime Operations in SQL Server Transact-SQL? If NULL values are involved in datetime operations, the result will be datetime NULL values. The following tutorial script shows you some good examples: USE FyiCenterData; GO SELECT GETDATE()+NULL; GO -------... 2017-02-05, 2283🔥, 0💬

Connecting MS Access to SQL Servers through ODBC
How To Connect MS Access to SQL Servers through ODBC? Once you got a DSN defined in the ODBC manager that connects to your SQL Server, you can connect a normal MS Access document to the Oracle server, and link an Access table to a SQL Server table. The tutorial below gives you a good example: Start ... 2024-03-17, 2282🔥, 0💬

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General MySQL Oracle SQL Server