v_sql := ‘UPDATE table_name SET column_name = ‘ || QUOTE(remove_extra_spaces(r.column_name)) || ‘ WHERE id = ‘ || r.id; EXECUTE IMMEDIATE v_sql; END LOOP; END; 5、使用数据泵进行批量处理 除了使用SQL脚本外,还可以使用Oracle的数据泵工具(Data Pump)进行批量处理,将需要处理的数据...
The OracleLTRIM() functionis used to remove all specified characters from the left end side of a string. By default, it removes leading spaces, but you can specify other characters to trim. Uses of Oracle LTRIM Function Removing Leading Spaces:Cleans up strings by removing unwanted leading spac...
If this parameter is omitted, the LTRIM function will remove all leading spaces from string1.Returns The LTRIM function returns a string value.Note See also the RTRIM and TRIM functions.Applies To The LTRIM function can be used in the following versions of Oracle/PLSQL: Oracle 12c, Oracle ...
UPDATEcontactsSETfirst_name =TRIM(first_name), last_name =TRIM(last_name);Code language:SQL (Structured Query Language)(sql) In this tutorial, you have learned how to use the OracleTRIM()function to remove unwanted characters from the leading, trailing, or both of a string. ...
Remove leading and trailing spaces from a string: TRIM( ' Brighten the corner where you are. '); --> 'Brighten the corner where you are.' Remove only leading spaces: x := ' Brighten the corner where you are. '; TRIM (LEADING FROM x) --> 'Brighten the corner where you are. ' ...
Optional. The string that will be removed from the left-hand side ofstring1. If this parameter is omitted, the LTRIM function will remove all leading spaces fromstring1. Note:See also theRTRIMandTRIMfunctions. Applies To The LTRIM function can be used in the following versions of Oracle/PL...
SQL> select chr(54740) zhao,chr(65) chr65 from dual; ZH C -- - 赵A 3.CONCAT 连接两个字符串; SQL> select concat('010-','88888888')||'转23' 高乾竞电话 from dual; 高乾竞电话 --- 010-88888888转23 4.INITCAP 返回字符串并将字符串...
取消透视，然后使用SUBSTR（或LIKE）进行过滤，并使用CASE表达式生成问题描述：
7 LTRIM(string) Remove leading spaces LTRIM(string) LTRIM(string, set) Remove leading chars TRIM(LEADING set FROM string) 8 MONTHS_BETWEEN(dt1, dt2) Get difference in months User-defined function 9 REPLACE(str, search) Remove search-string REPLACE(str, search, ") REPLACE(str, search,...
We can do the same thing with RTRIM to remove the space on the right of the string. In SQL Server 2017 and onwards, we can remove spaces from the left and right at the same time using the TRIM function. So, let’s mess up the data again and add some spaces, this time to all ...