selectregexp_substr('1,2,3,5','[^,]+')ASt1, regexp_substr('1,2,3,5','[^,]+',1,2)ASt2, regexp_substr('1,2,3,5','[^,]+',1,3)ASt3, regexp_substr('1,2,3,5','[^,]+',1,4)ASt4, regexp_substr('1,2,3,5','[^,]+',2)ASt5, regexp_substr('1,2,3,5...
selectregexp_substr('1,2,3,5','[^,]+')ASt1, regexp_substr('1,2,3,5','[^,]+',1,2)ASt2, regexp_substr('1,2,3,5','[^,]+',1,3)ASt3, regexp_substr('1,2,3,5','[^,]+',1,4)ASt4, regexp_substr('1,2,3,5','[^,]+',2)ASt5, regexp_substr('1,2,3,5...
问Oracle/SQL: Regexp类似于LIKE-%，但通配符是必需的(非可选)ENSELECT * FROM Person.Contact WHERE...
按unicode类型划分的Oracle SQL regexp_like可以用于各种场景,例如: 数据格式验证:可以使用regexp_like函数验证输入的数据是否符合特定的格式要求,如验证邮箱、电话号码等。 数据清洗:可以使用regexp_like函数过滤掉不符合特定模式的数据,从而提高数据质量。 数据提取:可以使用regexp_like函数从文本中提取符合特定...
就针对以下这种写法的性能考虑 REGEXP_LIKE(dispname,'^1225')与dispname LIKE '1225%' 这两种写法...
Examples# We will use theemployeestable in thesample databasefor the demonstration. Basic REGEXP_LIKE() example.# The following statement returns first names that contain the letter ‘c’: SELECTfirst_nameFROMemployeesWHEREREGEXP_LIKE( first_name,'c')ORDERBYfirst_name;Code language:SQL (Structur...
用 regexp_like这个函数来解决，正则表达式为：[[:punct:]]+这个正则可以找出任何标点符号。查询value中包含任何标点符号的记录如下：select * from xxx where regexp_like(value,'[[:punct:]]+');POSIX 正则表达式由标准的元字符（metacharacters）所构成： '$' 匹配输入字符串的结尾位置。如果设置...
Examples: Oracle REGEXP_INSTR function The following example findS the position of the first 't' character in a string.SELECT REGEXP_INSTR ('The web development Tutorial', 't') FROM dual; Sample Output: REGEXP_INSTR('THEWEBDEVELOPMENTTUTORIAL','T') --- 19 The above example will return ...
Oracle Database SQL Functions for Regular Expressions The database provides a set of SQL functions that allow you to search and manipulate strings using regular expressions. You can use these functions on any datatype that holds character data such as CHAR, NCHAR, CLOB, NCLOB, NVARCHAR2, and ...
TRANSFORM_VALUE ERROR_LOG_SAMPLE[DBMS_TYPE:regexp_replace("DBMS_TYPE",'Oracle','PostgreSQL')] or to replace all Oracle char(0) in a string by a space character: TRANSFORM_VALUE CLOB_TABLE[CHARDATA:translate("CHARDATA", chr(0), ' ')] The expression will be applied in the SQL stateme...