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Questions and Answers
基于出生日期的年龄计算是一个在各种应用程序中共同的任务，如Verify _______________ 的年龄以满足法律或金融目的。
个体
为存储生日值，您需要将日期/时间字段类型添加到您选择的表中。在本例中，我们将使用______________ 表。
Contact
添加日期/时间字段的设置包括：名称： "生日"；必需：______________ ；默认日期： "无" ；时间格式： "忽略时间"。
是
接下来，您需要添加一个等式字段类型来计算年龄，使用刚刚添加的生日字段。在同一个表中，添加一个等式字段，其设置包括：名称： "年龄"；等式类型：日期；日期类型：______________ ；结果类型：数字。
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在等式编辑器中使用以下等式，它将生日从当前日期中减去：______________ () - {生日}。
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添加 "生日" 字段和 "年龄" 字段后，navigate to the______________ 部分 of the Builder and select the table。
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本篇文章提供了一步步的指南，教您如何使用日期/时间字段和等式字段在数据库管理系统中______________ 生日基于的年龄。
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基于生日计算年龄是为了医疗目的或______________ 目的。
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您可以在表中添加一个日期/时间字段类型来存储______________ 值。
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Study Notes
Calculating Age Based on Birthdate
Calculating age based on birthdate is a common task in various applications, such as verifying the age of individuals for legal or financial purposes, or determining the age of a person for medical purposes. This article provides a step-by-step guide on how to calculate age based on birthdate using a date/time field and an equation field in a database management system, such as Knack.
1. Add a Date Field for the Birthday
To store the birthday value, you need to add a date/time field type to a table of your preference. In this example, we will be using the Contact table. Here are the settings for adding the date/time field:
- Name: "Birthday"
- Required: Yes
- Default Date: "None"
- Time Format: "Ignore Time"
2. Add an Equation Field to Calculate the Age
Next, you need to add an equation field type to calculate the age using the Birthday field you just added. In the same table, add an equation field with the following settings:
- Name: "Age"
- Equation Type: Date
- Date Type: years
- Result Type: Number
Use the following equation in the equation editor, which subtracts the birthday from the current date:
currentTime() - {Birthday}
3. Test the Equation
After adding the "Birthday" field and the "Age" field to the table, navigate to the Records section of the Builder and select the table. You will be able to see the new fields with the Age calculation:
Optional Features
You can use conditional equations to make the Birthday field optional or to add an extra layer of protection against bad data. This ensures that you can verify if there is any value stored in the Birthday field before proceeding with the calculation. In the event that there is no value present in the Birthday field, the equation will set the Age value to zero.
For example, you can use the following conditional equation:
{Birthday} > -2208988800 ? currentTime() - {Birthday} : 0
or
{Birthday} > -2208988800 & {Birthday} != 0 ? currentTime() - {Birthday} : 0
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Description
Learn how to calculate a person's age based on their birthdate in a Knack database management system. Follow a detailed tutorial that explains adding a date field for the birthday and an equation field to compute the age using the current date. Test the equation and explore optional features like conditional equations to handle cases where the birthdate field may be empty.
