In which OracleSQL versions does OVER clause exists? [closed] - sql

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In which version of Oracle is over clause is present? What is the purpose of this clause?

The OVER clause specifies the partitioning, ordering & window "over which" the analytic function operates
Reference:
OVER clause in Oracle

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NULL in SQL need it Removed [closed]

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I would like to remove the "Null" in my week Column. Any help? I tried screenshots provided
error
what i tried
I think you could try:
delete from [BKC_Menu_Analysis].[dbo].[FBBKCCompsWeekly] where week is NULL

SQL ( How do I use the CONCAT function) [closed]

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How do I use the CONCAT function on SQL.
That is pretty straightforward
SELECT CONCAT('hey', 'ho');

Comparing Two SP's Performance SQL Server [closed]

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there is any simple way to know which one of two SQL Store procedure works better?
Click the Include Actual Execution Plan before running both sp (on the same run) and check the percentages

Oracle data types variations [closed]

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I'm a new beginner to Oracle ,I'm so confused about the data types .
I don't know the difference between :
INT,INTEGER,NUMBER
CHAR,CHAR VARYING ,CHARACTER,CHARACTER VARYING
Integer datatype is now deprecated and it is equivalent to NUMBER(38,0). The keyword is retained for compatibility.
Also you can check the Oracle PL/SQL book

SQL Query - How to find a field with two or more same characters in it [closed]

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I'm using SQL Server DB and I would like to write query which will look for a fields with two or more slashes in it, lets say we have these rows:
1. abc/def/g
2. abcd/efg
3. a/b/c/d/e/f/g
So it should return 1st and 3rd row! What is the easiest way to do so?
Thanks in advance!