The following example returns the product id, product name, list price, and the name of the product with the lowest price: SELECTproduct_id, product_name, list_price,FIRST_VALUE(product_name)OVER(ORDERBYlist_pr
translate(x,from_str,to_str)函数在x中查找from_str中的字符,并将其转换成to_str中对应的字符 SELECT translate('I am Chinese, I love China', 'China', '中国') "Translate example" FROM dual; SELECT translate('我是中国人,我爱中国', '中国', 'China') "Translate example" FROM dual; 5、通...
1.basic syntax create [or replace] function fun_name [(parameter1[,parameter2])...] return data_type is|as [inner_variable] begin plsql_sentences; [exception] [dowith_sentences;] end [fun_name]; 2.Example Usage The sql query below is calculate average in the specify department. create...
工作中用到一段比较复杂的SQL查询脚本,使用了listagg()函数实现了具有多个值的字段的填充(即,列表聚合,list aggregation(我猜的))。 说简单点,listagg()函数可以实现多列记录聚合为一条记录,从而实现数据的压缩、致密化(data densification)。 以下内容转载自http://dacoolbaby.iteye.com/blog/1698957,SQL脚本做了...
Using Oracle NTILE() function example# The following statement divides into 4 buckets the values in thesalescolumn of thesalesman_performanceview from the year of 2017. SELECTsalesman_id, sales, NTILE(4)OVER(ORDERBYsalesDESC) quartileFROMsalesman_performanceWHEREyear=2017;Code language:SQL (Structure...
sql As you can see, the LISTAGG function doesn't really do much. This is because it's partitioned on the same value that is being aggregated. Example 9 What if we didn't want a partition and wanted to show the other data as well?
No, unfortunately, youcan’t perform this function on a LONG. According to Oracle, from version 8.0 you should be using the CLOB data type instead. The only way that I know of to get a SUBSTR from a LONG variable is towrite a PL/SQL procedurethat takes a ROWID, then converts that ...
Name of the PL/SQL stored procedure that the activity calls. Also, the PL/SQL stored procedure that a function activity calls must comply with a specific API. See:Standard API for PL/SQL Procedures Called by Function Activities. You can view the scripts that create theWF_REQDEMOstored proced...
SQL> Example 2-51 Simple CASE Expression with WHEN NULL 代码语言:javascript 代码运行次数:0 运行 AI代码解释 DECLAREgradeCHAR(1);--NULLbydefaultappraisalVARCHAR2(20);BEGINappraisal:=CASEgradeWHENNULLTHEN'No grade assigned'WHEN'A'THEN'Excellent'WHEN'B'THEN'Very Good'WHEN'C'THEN'Good'WHEN'D'...
http://docs.oracle.com/cd/E11882_01/server.112/e26088/functions003.htm#SQLRF20035 Aggregatefunctions return a single result row based on groups of rows, rather than onsingle rows. Aggregate functions can appear in select lists and in ORDER BY andHAVING clauses. They are com...