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5 min readTo join two tables in Oracle SQL, you can use the JOIN keyword followed by the type of join you want to perform (INNER JOIN, LEFT JOIN, RIGHT JOIN, or FULL JOIN). You need to specify the columns from each table that you want to use for the join condition using the ON keyword. The syntax for a simple INNER JOIN would be:SELECT t1.column1, t1.column2, t2.column3 FROM table1 t1 INNER JOIN table2 t2 ON t1.common_column = t2.
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4 min readDealing with streaming data in PHP involves reading and processing data as it becomes available, instead of waiting for the entire data set to be loaded before processing it. This is particularly useful for handling large amounts of data or real-time data sources such as websockets or APIs.To handle streaming data in PHP, you can use functions such as fread() or fgets() to read data from a stream, such as a file or network connection, in chunks.
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4 min readTo concatenate strings and variables in PowerShell, you can use the "+" operator. Simply place the variables or strings you want to concatenate within double quotes and use the "+" operator in between them. For example, to concatenate the variable $name with a string "Hello, ", you can write "Hello, " + $name. This will result in the combined string "Hello, [value of $name]".
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6 min readTo parse an XML array in Oracle, you can use the XMLTable function along with XPath expressions to extract data from the XML structure. This function creates a relational view of the XML data, allowing you to query it just like a table. By specifying the XMLStructure and the XPath expressions that define the path to the elements you want to extract, you can easily parse the XML array and retrieve the required data.
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8 min readTo create a streaming API with Node.js, you can use the built-in streams module that allows you to work with streams of data in a more efficient way. First, you need to create a server using the Express framework or the HTTP module in Node.js. Then, you can create a route that sends data to the client in chunks using the response object's "pipe()" method. You can also create a readable stream using the fs module to read data from a file or any other data source.
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5 min readIn PowerShell, the Get-Date cmdlet is used to retrieve the current system date and time. This cmdlet can be used in various ways to display information about the current date and time, such as formatting the output, displaying only specific parts of the date/time, or comparing dates. Additionally, the Get-Date cmdlet can also be used to calculate the difference between two dates and times, and to convert date and time values between different formats.
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6 min readThe observer design pattern can be implemented in C++ for streaming data by having a subject class that contains a list of observer objects. The subject class has methods for attaching, detaching, and notifying observers. Each observer class defines an update method that is called by the subject when new data is available.When streaming data, the subject class continuously generates and updates the data, and notifies all attached observer objects by calling their update methods.
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5 min readTo reset the default value on a column in an Oracle table, you can use the "ALTER TABLE" statement along with the "MODIFY" clause. First, you need to specify the table name and column name that you want to reset the default value for. Then, you can use the "DEFAULT" keyword followed by the new default value that you want to set for that column. Execute the ALTER TABLE statement to apply the changes and reset the default value on the specified column.
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3 min readTo write a binary stream object to a file in PowerShell, you can use the Set-Content cmdlet. First, you need to convert the binary object to a byte array using the GetBytes method. Then, you can use the -Encoding Byte parameter with Set-Content to write the byte array to a file in binary format.Here is an example code snippet: $binaryStreamObject = [System.IO.File]::ReadAllBytes("C:\path\to\binaryfile.bin") Set-Content -Path "C:\path\to\outputfile.
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6 min readTo write a client-server video streaming application, you will need to first determine the requirements and scope of the project. This includes identifying the necessary features such as video playback, streaming quality options, and user authentication.Next, you will need to design the architecture of the client-server system. This involves deciding on the communication protocol to be used, such as HTTP or RTSP, as well as the data flow between the client and server.
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2 min readTo open a PowerShell console window from an existing PowerShell session, you can use the Start-Process cmdlet with the -FilePath parameter to specify the path to the PowerShell executable (powershell.exe).Here is the command you can use: Start-Process powershell.exe This command will open a new PowerShell console window from the existing PowerShell session. You can also customize the behavior of the new console window by using additional parameters with the Start-Process cmdlet.