Posts (page 66)
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4 min readIn Oracle databases, it is not possible to have an infinite array directly. However, you can create an array with a very large number of elements to simulate an infinite array. One approach is to create a nested table or varray data type with a large maximum size, such as 999999999. This will allow you to store a large number of elements in the array, effectively making it appear infinite for most practical purposes.
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7 min readTo use chart.js in Nuxt.js, you will first need to install the necessary dependencies. You can do this by running the command npm install chart.js vue-chartjs in your project directory.Next, you will need to import these packages in your Nuxt.js component where you want to use the chart. Import Chart.js and VueChartJs at the top of your component file using the following code: import Chart from 'chart.
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6 min readTo pass values to a stored procedure in Oracle, you can use input parameters. Input parameters are declared in the stored procedure. When calling the stored procedure, you can pass values to these parameters. The values passed are then used within the stored procedure to perform the necessary operations. To pass values to a stored procedure in Oracle, you need to ensure that the data types of the values match the data types of the input parameters declared in the procedure.
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5 min readTo delete an instance of a chart using chart.js, you can first retrieve the chart instance that you want to delete by using the Chart.get(chartId) method. Once you have the chart instance, you can call the destroy() method on it to remove the chart from the DOM and clean up any associated resources. This will effectively delete the instance of the chart and free up any memory that was being used. Remember to also remove any references to the chart instance to prevent memory leaks.
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4 min readTo take the difference of dates in Oracle, you can use the DATEDIFF function along with the appropriate date formats. This function calculates the difference between two dates and returns the result in the desired units (days, months, years, etc.). You can also use simple subtraction to calculate the difference between two dates, which will return the result in days. Additionally, you can use the INTERVAL keyword to specify the unit of measurement for the date difference calculation.
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5 min readTo convert a Unix timestamp to a date using Chart.js, you can use the built-in Date object in JavaScript. First, you can create a new Date object and pass the Unix timestamp as a parameter. Then, you can use various methods of the Date object to extract the date in the format you desire, such as using getDate(), getMonth(), getFullYear(), getHours(), getMinutes(), and getSeconds().
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5 min readTo add a y-axis label in chart.js with vue.js, you can use the 'scales' option in your chart configuration. Within the 'scales' key, you can specify the 'yAxes' key to define the properties of the y-axis. Within the 'yAxes' key, you can set the 'scaleLabel' key to specify the label for the y-axis. Here is an example of how you can add a y-axis label in chart.js with vue.
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4 min readTo get a substring after a specific pattern in Oracle, you can use the SUBSTR function in combination with the INSTR function. First, use INSTR to find the position of the specific pattern in the string. Then, use SUBSTR to extract the substring starting from the position after the specific pattern.
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3 min readTo sort tooltip values in Chart.js, you can use the tooltips.callbacks.label function to customize the tooltip label. Within this function, you can access the tooltip item array and sort the values as needed before displaying them in the tooltip. By sorting the tooltip values, you can present the data in a more organized and meaningful way for the users.[rating:868fd947-1080-4ee7-96f9-1ec8a84c1019]How to customize the sorting function for tooltip values in chart.js.
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3 min readIn Oracle, you can sort varchar values using the ORDER BY clause in a SELECT statement. By default, varchar values are sorted in ascending order. If you want to sort them in descending order, you can use the DESC keyword after the column name in the ORDER BY clause. Keep in mind that varchar values are sorted alphabetically, so numbers and special characters may affect the sorting order.
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4 min readTo load data values from a cookie into chart.js, you first need to retrieve the data stored in the cookie using JavaScript. You can use the document.cookie property to access the cookie data and then parse it to extract the values you need for your chart.Once you have extracted the data values, you can use them to update the dataset of your chart in chart.js. You will need to loop through the data and update the appropriate data points or labels in the chart dataset.
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6 min readTo retrieve deleted data from tables in Oracle, you can use the Flashback Query feature. Flashback Query allows you to query a table and see its contents at a previous point in time, including the data that has been deleted. You can use the AS OF clause in your SELECT statement to specify a timestamp or SCN (System Change Number) to retrieve the data as it existed at that point in time.