C validating data types
Our formula will use the return_type argument of 2, which returns 1 - 7 for Monday through Sunday.Data validation is a process that ensures the delivery of clean and clear data to the programs, applications and services using it.The SUBSTITUTE function replaces each space character - " " - with an empty string - "" The formula in this example checks that the entry in cell B2 is equal to the entry without spaces. The LEN function counts the number of characters entered in cell D2, and compares that to the number of characters after SUBSTITUTE removes the space characters.You can prevent users from adding ANY spaces in the cell -- whether the entry is text, numbers, or a combination of both. The FIND function looks for the space character - " " - and the ISERROR function result is TRUE, if the space character is not found.This is achieved through data validation's checks and rules that routinely check for the validity of data.These rules are generally defined in a data dictionary or are implemented through data validation software.The dates can be typed into the rule boxes, or you can refer to cells where the minimum and maximum dates are entered.You can also use a formula with the built-in date rule, such as =TODAY()-30. For date rules that do not require a specific date range, create a custom rule.
In this example, an Employee ID is entered in the first column, and each ID must be unique. When you create a formatted Excel table, you can use data validation to prevent duplicates within a column.
In this example, Employee ID is entered in the first column, and each ID must be unique.
NOTE: To prevent duplicates based on entries in multiple columns, see the instructions below Follow these steps, to set up a named table, like the one shown below.
However, it doesn't limit the type of entry that can go into the Employee ID cell.
In this example, the rule is revised, to require a 5-digit number, with no duplicates.
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It checks for the integrity and validity of data that is being inputted to different software and its components.