解释:string:源字符串 subString:要查找的子字符串 position:查找的开始位置 ocurrence:源字符串中第几次出现的子字符串 For example: INSTR('CORPORATE FLOOR','OR', 3, 2)中,源字符串为'CORPORATE FLOOR', 目标字符串为'OR',起始位置为3,取第2个匹配项的位置;返回结果为 14 '1...
substr("ABCDEFG", -3); //返回:EFG,注意参数-3,为负值时表示从尾部开始算起,字符串排列位置不变。 2.INSTR(string,subString,position,ocurrence)查找字符串位置 解释:string:源字符串 subString:要查找的子字符串 position:查找的开始位置 ocurrence:源字符串中第几次出现的子字符串 For example: INSTR('C...
Now that we understand the syntax of the Oracle substring function, let’s use see it in action by executing a query with this function. Execute the SQL query containing the Oracle substring function as shown below. In this example, we are passing the text “Oracle Substring Function” as t...
2.INSTR(string,subString,position,ocurrence)查找字符串位置 解释:string:源字符串 subString:要查找的子字符串 position:查找的开始位置 ocurrence:源字符串中第几次出现的子字符串 For example: INSTR('CORPORATE FLOOR','OR', 3, 2)中,源字符串为'CORPORATE FLOOR', 目标字符串为'OR',起始位置为3,取第...
2.INSTR(string,subString,position,ocurrence)查找字符串位置 解释:string:源字符串 subString:要查找的子字符串 position:查找的开始位置 ocurrence:源字符串中第几次出现的子字符串 For example: INSTR('CORPORATE FLOOR','OR', 3, 2)中,源字符串为'CORPORATE FLOOR', 目标字符串为'OR',起始位置为3,取第...
SUBSTR(string,1,INSTR(string,substring,1,1)) Also, you can use it as part of the start_position parameter if you want to start from the occurrence of a specific character. For example, if names are stored as “lastname, firstname”, you canuse this method to extract the firstname fro...
2.INSTR(string,subString,position,ocurrence)查找字符串位置 解释:string:源字符串 subString:要查找的子字符串 position:查找的开始位置 ocurrence:源字符串中第几次出现的子字符串 For example: INSTR('CORPORATE FLOOR','OR', 3, 2)中,源字符串为'CORPORATE FLOOR', 目标字符串为'OR',起始位置为3,取第...
转自:https://www.cnblogs.com/dshore123/p/7813230.html 1)instr()函数的格式 (俗称:字符查找函数) INSTR( string, substring [, start_position [, th_appearance ] ] ) 参数: string - 要搜索的字符串。字符串可以是CHAR,VARCHAR2,NCHAR,NV... ...
In oracle/PLSQL, the substr functions allows you to extract a substring from a string. The syntax for the substr function is: substr( string, start_position, [ length ] ) 说明: string is the source string. start_position is the position for extraction. The first position in the string ...
Basic Oracle SUBSTR() function example# The following example uses theSUBSTR()function to extract a substring from a string: SELECTSUBSTR('Oracle Substring',1,6)SUBSTRINGFROMdual;Code language:SQL (Structured Query Language)(sql) Try it