In Access, the INSTR function returns 0 if the specified character is not found in the string. It also only returns the position of the first occurrence of the specified character. For instance, in the string "ABA", INSTR would return 1 and not 3. It's worth noting that you...
Microsoft 365 专属 AccessAccess 2024Access 2021Access 2019Access 2016 返回一个Variant(Long) 值,指定一个字符串在另一个字符串中首次出现的位置。 查看一些示例 语法 InStr([start,]string1, string2[, compare]) InStr函数语法具有以下参数: 参数
If string2 is not found within string1, this function returns 0If string1 is zero-length, this function returns 0If string1 is null, this function returns nullIf string2 is zero-length, this function returns the value in the start parameter...
InMicrosoft Access, theInStr functionis a powerful tool that returns the position of the first occurrence of one string within another. This function is particularly useful when working with text strings in your database, allowing you to locate specific characters or phrases with ease. For example...
默认为vbBinaryCompare模式,即⼆进制⽐较,还可以指定为vbTextCompare模式(⽂本⽐ 较,不区分⼤⼩写)和vbDatabaseCompare模式(数据库⽐较,只适⽤于Access)。如果指定该参数,就要同时指定参数Start。如果省略 该参数,⽐较模式由Option Compare语句值决定。 简单地说,InStr函数就是查找String2在String1中第...
The main usage of the Instr Function is to extract a part of the string (sub-string) from a string. For example, if you have list of full names of employees in a worksheet and you want to extract the first name of the employee. You can use instr function and mid function to get ...
vbDatabaseCompare 2 仅适用于Microsoft Access，执行一个基于数据库中信息的比较。返回值 如果 InStr返回 string1 为零长度 0 string1 为 Null Null string2 为零长度 Start string2 为 Null Null string2 找不到 0 在 string1 中找到string2 找到的位置 start > string2 0 说明 InStrB 函数...
常數值描述 vbUseCompareOption -1 使用Option Compare 陳述式的設定來執行比較。 vbBinaryCompare 0 執行二進位比較。 vbTextCompare 1 執行文字比較。 vbDatabaseCompare 2 僅限Microsoft Access。 根據資料庫中的資訊執行比較。傳回值展開資料表 IfInStr 傳回 string1 長度為零 0 string1 是Null Null string2 ...
If the ‘substring’ argument is an empty string (“”) or a null value, the InStr function will return the value 1. Important Notes: The InStr function is a very useful tool for manipulating and searching strings in VBA. It can be combined with other string functions, such as ‘Left’...
The InStrB function is used with byte data contained in a string. Instead of returning the character position of the first occurrence of one string within another, InStrB returns the byte position.ExampleThis example uses the InStr function to return the position of the first occurre...