一、原题 Which tasks can be performed using SQL functions built into Oracle Database ? (Choose three.) A. displaying a date in a nondefault format. B. finding the number of characters in an expression. C. substituting a character string in a text express…
一、 replace vs 重建 遇到开发提了个问题,create or replace view和重建视图(dropcreate)有什么区别,查询资料整理了一下。 1. create or replace
当存在同名视图时,尝试将其替换新视图语句必须与现有视图查询具有相…
一、原题 View the Exhibit and examine the structure of the CUSTOMERS table. In the CUSTOMERS table, the CUST_LAST_NAME column contains the values Anderson and Ausson. You issue the following query: SQL> SELECT LOWER(REPLACE(TRIM(son FROM cust_last_nam…
使用如下几个SQL函数SUBSTRING、REPLACE、LOACALTOUTC、TO_CHAR SUBSTRING(REPLACE(localtoutc(to_char(acdoca.timestamp),UTC-8),-,),1,8) as budat,
SUBSTRING(REPLACE(localtoutc(to_char(acdoca.timestamp),UTC-8),:,),12,6) as erzet,
输入: acdoca.timesta…