General MySQL Oracle SQL Server

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BENCHMARK() - Repeating Expression Evaluation
How to evaluate an expression repeatedly for benchmark testing using the BENCHMARK() function? BENCHMARK(count, exp) is a MySQL built-in function that evaluates an expression repeatedly for benchmark testing and returns 0. For example: SELECT BENCHMARK(1000000, AES_ENCRYPT('hello','goodbye') );-- +-... 2024-07-17, 1351🔥, 2💬

💬 2024-07-17 Iqra Technology: This is a great overview of the `BENCHMARK()` function in MySQL! Your examples clearly illustrate how it can be used to evaluate...

CURRENT_ROLE() - Current Role of Logged-In User
How to obtain the current role of the logged-in user using the CURRENT_ROLE() function? CURRENT_ROLE() is a MySQL built-in function that returns the current role of the logged-in user. For example: SELECT CURRENT_ROLE(); -- +----------------+ -- | CURRENT_ROLE() | -- +----------------+ -- | NONE | -... 2024-07-15, 2225🔥, 0💬

CRC32() - Cyclic Redundancy Check 32-Bit
How to calculate the 32-bit CRC (Cyclic Redundancy Check) value using the CRC32() function? CRC32(str) is a MySQL built-in function that calculates the 32-bit CRC (Cyclic Redundancy Check) value of a given character string and returns it as an integer. For example: SELECT CRC32('MySQL'), HEX(CRC32('... 2024-07-15, 1433🔥, 0💬

MySQL Functions on System Information
Where to find reference information and tutorials on MySQL database functions on System Information? I want to know how to use DATABASE(), VERSION() and other functions. Here is a collection of reference information and tutorials on MySQL database functions on System Information compiled by FYIcente... 2024-07-15, 1419🔥, 0💬

CONNECTION_ID() - Thread ID of Current Connection
How to obtain the connection ID of the current connection using the CONNECTION_ID() function? CONNECTION_ID() is a MySQL built-in function that returns the connection ID of the current connection. The connection ID is also referred as thread ID or process ID. For example: SELECT CONNECTION_ID(); -- ... 2024-07-15, 1231🔥, 0💬

odbc_tables() - Listing All Tables in the Database
How To List All Tables in the Database using odbc_tables()? If you want to get a list of all tables in the database, you can use the odbc_tables() function, which can actually be used to list all tables and views in the database. The syntax of odbc_tables() is: $result_set = odbc_tables($connection_... 2024-07-11, 2153🔥, 0💬

odbc_result() - Retrieve Field Values
How To Retrieve Field Values using odbc_result()? After calling odbc_fetch_row(), the field values of the fetched row are available in the result set object. You can use odbc_result() to retrieve the value of any given field with two syntax formats: $value = odbc_result($field_name); #- Retrieving v... 2024-07-11, 2147🔥, 0💬

odbc_data_source() - Listing All DSN Entries
How To List All DSN Entries on Your Local Machine using odbc_data_source()? If you are interested to know what DSN entries are available on your local machine, you can use odbc_data_source($con, SQL_FETCH_FIRST) and odbc_data_source($con, SQL_FETCH_NEXT) in a loop to list all DSN entries defined on ... 2024-07-11, 2130🔥, 0💬

Testing ODBC DSN Connection Settings
How To Test ODBC DSN Connection Settings? Assuming you have followed other FYIcenter.com tutorials and created an ODBC DSN called "FYI_SQL_SERVER", and planning to use it your PHP scripts, you should test this ODBC connection first as shown in this tutorial: 1. Go to Control Panel &gt; Administr... 2024-07-11, 2099🔥, 0💬

odbc_connect() - Connecting to a SQL Server through an ODBC DSN
How To Connect to a SQL Server using odbc_connect()? If you have an ODBC DSN (Data Source Name) created linking to a SQL Server, you are ready to connect to the SQL Server through the DSN with ODBC functions. There is no changes needed in the php.ini configuration file. The tutorial script below sho... 2024-07-11, 2067🔥, 0💬

odbc_errormsg() - Retrieving ODBC Error Messages
How To Retrieve Error Messages using odbc_errormsg()? When you call odbc_exec() to execute a SQL statement, and the execution failed on the SQL Server, you can use odbc_error() and odbc_errormsg() to retrieve the error code and error messages. The tutorial script below shows you a good example: &... 2024-06-30, 2668🔥, 0💬

odbc_exec() - Executing SQL Statements
How To Execute a SQL Statement using odbc_exec()? Once you have created an ODBC connection object, you can use the odbc_exec() function to send a SQL statement to the SQL Server linked to the connection object for execution. Here is a simple PHP script that creates a new schema and a new table: &... 2024-06-30, 2486🔥, 0💬

Turning Off PHP Warning Messages for ODBC Connection
How To Turn Off Warning Messages during PHP Execution? If don't want see warning messages generated from the PHP engine when executing PHP scripts, you can change the error_reporting setting in the php.ini configuration file. Open php.ini and change the following lines: ;error_reporting = E_ALL &... 2024-06-30, 2268🔥, 0💬

odbc_fetch_row() - Looping through Result Set Objects
How To Loop through Result Set Objects using odbc_fetch_row()? If the returning output of a query statement is captured in a result set object, you can use odbc_fetch_row() to loop through each row in the output. The tutorial PHP script below shows you how to list tables in the database: &lt;?ph... 2024-06-30, 2237🔥, 0💬

odbc_prepare() - Creating Prepared Statements
How To Create Prepared Statements using odbc_prepare()? If you have a SQL statement that need to executed repeatedly many times with small changes, you can create a prepared statement object with parameters so it can be executed more efficiently. There are two functions you need to use prepare and e... 2024-06-03, 2472🔥, 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, 2222🔥, 0💬

SQL Server FAQs - PHP ODBC Functions - Managing Tables and Data Rows
A collection of 14 FAQs on using PHP ODBC functions to connect to manage tables and data rows. Clear explanations and tutorial exercises are provided on creating tables; inserting multiple data rows; updating and deleting data rows; searching data from multiple tables; looping through result sets; w... 2024-06-03, 2204🔥, 0💬

PHP ODBC - Inserting Data into an Existing Table
PHP ODBC - How To Insert Data into an Existing Table? If you want to insert a row of data into an existing table, you can use the INSERT INTO statement as shown in the following sample script: &lt;?php $con = odbc_connect('FYI_SQL_SERVER', 'sa','FYIcenter');$sql = "INSERT INTO fyi_links (id, url... 2024-06-03, 2123🔥, 0💬

odbc_columns() - Listing All Columns in a Table
How To List All Columns in a Table using odbc_columns()? If you want to get a list of all columns in a table, you can use the odbc_columns() function, which can actually be used to list all columns in all tables and views in the database. The syntax of odbc_columns() is: $result_set = odbc_columns($... 2024-06-03, 2109🔥, 0💬

PHP ODBC - odbc_fetch_array() - Looping through Returning Rows
PHP ODBC - How To Loop through Returning Rows? The best way to query tables and loop through returning rows is to run a SELECT statement with the odbc_exec() function, catch the returning object as a result set, and loop through the result with odbc_fetch_array() function in a while loop as shown in... 2024-05-29, 2322🔥, 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, 2160🔥, 0💬

PHP ODBC - odbc_num_rows() - Number of Affected Rows
PHP ODBC - How To Get the Number of Affected Rows? If you insert multiple rows with a single INSERT statement, you can use the odbc_num_rows() function to find out how many rows were inserted. odbc_num_rows($result_set) returns the number of affected rows based on the result set object returned by t... 2024-05-29, 2101🔥, 0💬

PHP ODBC - Inserting Multiple Rows with a Subquery
PHP ODBC - How To Insert Multiple Rows with a subquery? If want to insert rows into a table based on data rows from other tables, you can use a subquery inside the INSERT statement as shown in the following script example: &lt;?php $con = odbc_connect('FYI_SQL_SERVER', 'sa','FYIcenter');$sql = "... 2024-05-29, 2095🔥, 0💬

PHP ODBC - Returning Result Set Objects
PHP ODBC - What Is a Result Set Object Returned by odbc_exec()? A result set object is a logical representation of data rows returned by odbc_exec() function on SELECT statements. Every result set object has an internal pointer used to identify the current row in the result set. Once you get a resul... 2024-05-29, 2088🔥, 0💬

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General MySQL Oracle SQL Server