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5 min readTo delete duplicate rows in MySQL without an id column, you can use the following SQL query: DELETE t1 FROM your_table t1 INNER JOIN your_table t2 WHERE t1.column_name = t2.column_name AND t1.primary_key > t2.primary_key Replace your_table with the name of your table and column_name with the name of the column you want to check for duplicates. This query will delete all but one of the duplicate rows based on the column values.
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8 min readPivot points are commonly used in technical analysis in finance to identify potential support and resistance levels for a given security. In C++, programmers can use pivot points to determine key levels that may influence trading decisions.To calculate pivot points in C++, one needs to have the high, low, and closing prices of the security for a given time period.
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5 min readIn MySQL, you can format numbers using the FORMAT() function. This function allows you to specify the number of decimal places and the thousands separator for a given number.To format a number in MySQL, you can use the following syntax: FORMAT(number, decimals)For example, to format the number 123456.789 as a currency with two decimal places and a comma separator for thousands, you would use the following query: SELECT FORMAT(123456.789, 2)This would return the formatted number as "123,456.
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6 min readIn JavaScript, you can compute the rate of change (ROC) by taking the difference between two values and dividing it by the time interval over which the change occurs. To do this, you would need to have the initial and final values, as well as the corresponding time points. Once you have these values, you can calculate the ROC by subtracting the initial value from the final value and then dividing that result by the time difference.
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4 min readTo get stored data by delimiter (;) in MySQL, you can use the SUBSTRING_INDEX function along with the LOCATE function. To extract values between delimiters, you would first check for the position of the delimiter using the LOCATE function, then use the SUBSTRING_INDEX function to extract the substring between delimiters. You can use this approach to retrieve stored data that is separated by a specific delimiter in a MySQL database.
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4 min readTo calculate the Rate of Change (ROC) in TypeScript, you would need to first determine the initial and final values of the quantity you are measuring over a specific time period. Subtract the initial value from the final value to get the change in quantity. Then divide the change in quantity by the initial value and multiply by 100 to get the rate of change expressed as a percentage.
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8 min readTo create a Commodity Channel Index (CCI) in Swift, you first need to define the variables that will be used for calculations. These variables include typical price, simple moving average (SMA), and mean deviation. Once you have the variables defined, you can calculate the typical price by averaging the high, low, and close prices. Next, calculate the SMA by adding up the typical prices and dividing by the desired period length.
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6 min readOn-Balance Volume (OBV) is a technical analysis indicator that measures positive and negative volume flow. It can help traders identify whether there is buying or selling pressure on a particular asset.To calculate OBV in C++, you would typically iterate through the historical price data of the asset and compare the current volume to the previous volume. If the current closing price is higher than the previous closing price, you add the current volume to the OBV.
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5 min readTo calculate Average Directional Index (ADX) in Clojure, you first need to gather the necessary data including high, low, and closing prices for a specific time period. Then, calculate the True Range (TR), Positive Directional Movement (+DM), and Negative Directional Movement (-DM) using the high and low prices.Next, calculate the Directional Movement Index (DX) by dividing the absolute difference between +DM and -DM by the sum of +DM and -DM.
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5 min readTo create Moving Average Convergence Divergence (MACD) using Go, you first need to calculate the Exponential Moving Averages (EMAs) of the closing prices of the stock or asset you are analyzing. Typically, a 12-period EMA and a 26-period EMA are used for the MACD calculation.Once you have calculated the EMAs, subtract the 26-period EMA from the 12-period EMA to get the MACD line. This line represents the convergence and divergence of the two moving averages.
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6 min readTo calculate pivot points in C++, you first need to have the high, low, and closing prices of a financial asset for a given period. The pivot point is a technical analysis indicator used to determine potential support and resistance levels for a security.To calculate the pivot point, you can use the following formula:Pivot Point = (High + Low + Close) / 3Once you have calculated the pivot point, you can also determine support and resistance levels using additional formulas.