Technical Interview Questions
The foreign key is used to link one or more tables together. It matches the primary key field of another table to link the two tables. It allows us to create a parent-child relationship with the tables. We can add a foreign key to a table in two ways: Using the CREATE TABLE Statement Using … Read more
SELECT TO_CHAR (SYSDATE, ‘YYYY-MM-DD HH24:MI:SS’) “Current_Date” FROM DUAL; In Oracle, you can use the TO_CHAR function to format the current date and time. The syntax to find the current date and time in the “YYYY-MM-DD” format is as follows: SELECT TO_CHAR(SYSDATE, ‘YYYY-MM-DD’) FROM DUAL; Here, SYSDATE is a function that returns the current date and … Read more
The SYSDATE() function is used in Oracle to find the current date and time of operating system on which the database is running. SELECT TO_CHAR (SYSDATE, ‘MM-DD-YYYY HH24:MI:SS’) “Current_Date” FROM DUAL; In Oracle, you can find the current date and time using the SYSDATE function. Here’s an example: SELECT SYSDATE FROM DUAL; This query selects … Read more
Syntax: to_date (string , format) Let us take an example : to_date (‘2012-12-12’, ‘YYYY/MM/DD’) It will return December 12, 2012. In Oracle, you can convert a string to a date using the TO_DATE function. The syntax is as follows: TO_DATE(your_string, ‘your_date_format’) Here, your_string is the string you want to convert to a date, and ‘your_date_format’ … Read more
Oracle reports are use to make business enable with the facility to provide information of all level within or outside in a secure way. Oracle report uses REP files and RDF file extensions. In Oracle Reports, the default extension for report files is typically “.rdf” (Report Definition File). The “.rdf” file contains the layout and … Read more