If you’ve got an index in a SQLite database that you no longer need, you should probably get rid of it. Keeping unused indexes can be a drag on database performance, especially if your data is being regularly updated.
This article shows you how to delete an index in SQLite.
Continue readingThe SINH() function in SQLite calculates the hyperbolic sine of a value. The hyperbolic sine is a mathematical function that can return any real number and grows exponentially as its input increases or decreases.
The log10() function in SQLite is used to calculate the base-10 logarithm of a number. This function is part of SQLite’s built-in mathematical functions, and it returns the logarithmic value of the argument passed to it.
The ATAN2() function in SQLite calculates the arc tangent (inverse tangent) of the ratio of two given numeric values, typically representing the y-coordinate and x-coordinate of a point.
Unlike ATAN(), which calculates the angle based only on a single tangent value, ATAN2() considers both the x and y values to determine the correct quadrant for the resulting angle.
The ATAN() function in SQLite calculates the arc tangent (inverse tangent) of a given numeric value. The result is the angle in radians whose tangent is the specified number.
SQLite provides various mathematical functions out of the box, and one of them is the power() function (also available as pow()).
The power() function calculates the result of raising one number to the power of another. In other words, it performs an exponentiation operation. This function is particularly useful for mathematical operations where powers or exponents are required.
The ATANH() function in SQLite calculates the inverse hyperbolic tangent of a given numeric value. The result is the value whose hyperbolic tangent is the specified number.
The .changes dot command in SQLite is a helpful utility for developers working with databases, especially when tracking the number of rows affected by SQL statements like INSERT, UPDATE or DELETE.
When used in the SQLite command-line interface, .changes toggles an option that shows the count of modified rows after executing a command.
This article looks at how the .changes command works, how it can be enabled or disabled, and provides an example to illustrate how it works.
The exp() function in SQLite calculates the exponential of a given number, where the base is the mathematical constant e (approximately 2.71828). In other words, it returns e raised to the power of x for a given input x.
This function can be useful in scientific and statistical calculations involving exponential growth, decay, and other natural logarithmic-based transformations.
Continue readingIn SQLite, the LN() function returns the natural logarithm (logarithm to the base e) of a given positive number.
This function is helpful in mathematical calculations involving growth rates, exponential functions, and natural logarithmic transformations.
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