General MySQL Oracle SQL Server

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sys.trigger_events - Event List of an Existing Trigger in SQL Server
How To See the Event List of an Existing Trigger using sys.trigger_events in SQL Server? If what are the DML events an existing trigger is handling, you can use the catalog view, sys.trigger_events. You need to join sys.trigger_events and sys.triggers to get a better list as shown in this tutorial e... 2016-10-24, 3834🔥, 0💬

Sample Databases Are Provided by Microsoft in SQL Server
What Sample Scripts and Sample Databases Are Provided by Microsoft in SQL Server? In order to help you to learn SQL Server, Microsoft provides several free sample scripts and sample databases. SqlServerSamples.msi - 25,469 KB: Sample scripts. AdventureWorksDB.msi - 28,053 KB: Sample OLTP database: A... 2016-12-04, 3801🔥, 0💬

Using User Defined Functions in SQL Server Transact-SQL
Where to find answers to frequently asked questions on Using User Defined Functions in SQL Server Transact-SQL? Here is a list of frequently asked questions and their answers compiled by FYIcenter.com DBA team on Using User Defined Functions in SQL Server Transact-SQL. Clear answers are provided wit... 2016-12-28, 3793🔥, 0💬

"DECLARE ... CURSOR" - Declaring Cursor Objects in SQL Server
How To Declare a Cursor with "DECLARE ... CURSOR" in SQL Server Transact-SQL? If you want to use a cursor to represent the result set of a query, you need to define a cursor name with a SELECT sub-statement using the "DECLARE ... CURSOR" statement using the following syntax format: DECLARE cursor_na... 2016-10-17, 3793🔥, 0💬

Types of Data Literals in SQL Server Transact-SQL
What are different types of data literals supported in SQL Server Transact-SQL? There are 8 types of data literals supported in SQL Server Transact-SQL: 1. Integer Number Literals - Sequences of numbers prefixed with +/- sign if needed. Integer number literals are used to represent integer values. F... 2017-05-20, 3773🔥, 0💬

Converting Integers into Date and Time Values in SQL Server
Can Integers Be Converted into Date and Time Values in SQL Server Transact-SQL? Can integers be converted into date and time values? The answer is yes. The input integer will be used as the number of days relative to the base date: Jan 1, 1900. The time of the day will be set to 0, midnight of the d... 2017-02-22, 3753🔥, 0💬

"FULL OUTER JOIN ... ON" - Writing Queries with Full Outer Joins in SQL Server
How To Write a Query with a Full Outer Join in SQL Server? If you want to query from two tables with a full outer join, you can use the FULL OUTER JOIN ... ON clause in the FROM clause. The following query returns output with a full outer join from two tables: fyi_links and fyi_rates. The join condi... 2016-10-29, 3752🔥, 0💬

"sp_rename ... 'COLUMN'" - Renaming an Existing Column in SQL Server
How to rename an existing column with the "sp_rename" stored procedure in SQL Server? If you have an existing column in a table and you want to change the column name, you can use the "sp_rename ... 'COLUMN'" stored procedure. "sp_rename" allows you to change names of COLUMN, DATABASE, INDEX, USERDA... 2016-11-17, 3750🔥, 0💬

CREATE VIEW - Creating a View on an Existing Table in SQL Server
How To Create a View on an Existing Table in SQL Server? If you want to a view on an existing table, you can use the CREATE VIEW statement in a simple syntax: CREATE VIEW view_name AS SELECT ... The tutorial exercise below shows you how to create a view to represent sub set of data stored in fyi_lin... 2016-11-05, 3745🔥, 0💬

"ALTER TABLE ... DROP COLUMN" - Deleting Existing Columns in SQL Server
How To Delete an Existing Column in a Table with "ALTER TABLE ... DROP COLUMN" in SQL Server? If you have an existing column in a table and you do not need that column any more, you can delete it with "ALTER TABLE ... DROP COLUMN" statement. Here is a tutorial script to delete an existing column: AL... 2016-11-17, 3741🔥, 0💬

Incrementing or Decrementing Parts of DATETIME Values in SQL Server
How To Increment or Decrement Parts of DATETIME Values in SQL Server Transact-SQL? If you want to increment or decrement one part of a date and time value, you can use the DATEADD() function in the following format: DATEADD(datepart, number, date) returns DATETIME: "date" - the input date "number" -... 2017-02-20, 3739🔥, 0💬

Creating a View with Data from Multiple Tables in SQL Server
Can You Create a View with Data from Multiple Tables in SQL Server? Can You Create a View with Data from Multiple Tables? The answer is yes. A view can be created with a SELECT statement to join data from multiple tables. It is a common practice to normalize data into multiple tables. Then using a v... 2016-11-05, 3734🔥, 0💬

Overflow Errors on Converting Big Values to NUMERIC in SQL Server
What Happens When Converting Big Values to NUMERIC Data Types in SQL Server Transact-SQL? If you are converting a numeric expression to a NUMERIC data type and the value is too big for the storage size, you will get an arithmetic overflow error as shown in the following examples: -- Overflow error o... 2017-03-22, 3699🔥, 0💬

Running Queries with 'sqlcmd' Tool in SQL Server
How to run Queries with "sqlcmd" tool in SQL Server? "sqlcmd" is a client tool that you can use to interact SQL server. You can follow the tutorial below to run queries on the local SQL Server 2005 Express. 1. Open a command window and enter the following command to start "sqlcmd" and run a simple q... 2016-12-04, 3698🔥, 0💬

"sp_help" - Getting a List of Columns in a Table in SQL Server
How To Get a List of Columns using the "sp_help" Stored Procedure in SQL Server? Another way to get a list of columns from a table is to use the "sp_help" stored procedure. "sp_help" returns more than just a list of columns. It returns: the table information, the column information, the identity col... 2016-11-17, 3678🔥, 0💬

What Are Logical/Boolean Operations in SQL Server
What Are Logical/Boolean Operations in SQL Server Transact-SQL? Logical (Boolean) operations are performed on Boolean values with logical operators like 'AND', 'OR', or 'NOT'. Logical operations return Boolean values. SQL Server 2005 supports the following logical operations: AND - Returns TRUE if b... 2017-01-11, 3677🔥, 0💬

BREAK of Loop Statement in SQL Server Transact-SQL
How to break a WHILE look statement in SQL Server Transact-SQL? How to use BREAK statements? You can use the BREAK statement to break a WHILE loop inside the statement block in Transact-SQL using this syntax: WHILE condition BEGIN statement_1 statement_2 ... BREAK; statement_n ... END When a BREAK s... 2017-01-11, 3675🔥, 0💬

"sys.objects" - Listing All Objects in a Given Schema in SQL Server
How To List All Objects in a Given Schema in SQL Server? If you are wonder what objects are stored in a given schema as an object container, you can use view "sys.objects" to get a list of all objects in a schema. The tutorial exercise shows you how to list all objects in schema "fyi" and "dbo": -- ... 2016-10-22, 3670🔥, 0💬

"sys.columns" - Getting a List of Columns in a Table in SQL Server
How To Get a List of Columns using the "sys.columns" View in SQL Server? If you have an existing table, but you don't remember what are the columns defined in the table, you can use the "sys.columns" system view to get a list of all columns of all tables in the current database. In order to a list o... 2016-11-17, 3652🔥, 0💬

Verifying SQL Server Running Status in SQL Server
How do you know if SQL Server is running on your local system in SQL Server? After installing SQL Server 2006 Express Edition, it will be running on your local system quietly as a background process. If you want to see this process is running, run Windows Task Manager. You should see a process calle... 2016-12-08, 3651🔥, 0💬

"SELECT ... INTO" - Creating New Tables With Queries in SQL Server
How to create new tables with "SELECT ... INTO" statements in SQL Server? Let's say you have a table with many data rows, now you want to create a backup copy of this table of all rows or a subset of them, you can use the "SELECT ... INTO" statement. The tutorial script below gives you a good exampl... 2016-11-17, 3637🔥, 0💬

sys.indexes - Viewing Existing Indexes on an Given Table in SQL Server
How To View Existing Indexes on an Given Table using sys.indexes in SQL Server? Another way to view existing indexes defined for a given table is to use the system view called "sys.indexes". The tutorial exercise shows you how many indexes were defined from the previous tutorial on table "fyi_links"... 2016-11-15, 3630🔥, 0💬

Unicode Character Data Types in SQL Server Transact-SQL
What are Unicode character string data types supported in SQL Server Transact-SQL? Unicode character string data types are used to hold Unicode character strings. There are 3 Unicode character string data types supported in SQL Server Transact-SQL: 1. NCHAR (or NATIONAL CHAR, or NATIONAL CHARACTER) ... 2017-04-08, 3623🔥, 0💬

Converting Binary Strings into Character Strings in SQL Server
Can Binary Strings Be Converted into Character Strings in SQL Server Transact-SQL? Binary strings and character strings are convertible. But there are several rules you need to remember: Binary strings can be converted implicitly to character strings by assignment operations. Binary strings can not ... 2017-02-28, 3620🔥, 0💬

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General MySQL Oracle SQL Server