How to convert BLOB to CLOB
Ever wondered how to turn pictures or other binary data back into readable text in Oracle PL/SQL? Let’s explore the easy steps of converting BLOB (Binary Large Object) […]
More DetailsHow to convert CLOB to BLOB
Converting text data from CLOB to BLOB can be tricky. Let’s explore how to make that conversion. I used the function with UTF-8 character set. Additionally, if you […]
More DetailsHow to delete duplicate rows
Basically, there are several ways to do this. In this post, I show two different ways. Let’s start with a basic example. Set Up Checking if the table […]
More DetailsHow to use dynamic SQL with DBMS_SQL
There may be situations where we need to run dynamic queries in our developments. We can utilize execute immediate statement or DBMS_SQL package in order to use dynamic […]
More DetailsORA-01704 string literal too long
ORA-01704 error occurs when a string literal more than 4000 characters in SQL. In the example below the string length is exactly 4000 characters. So, if one character […]
More DetailsHow to fix cardinality misestimate?
In this post, I am going to explain how to correct the cardinality estimate in 5 different methods. Cardinality estimate is one of the first place to check […]
More DetailsCUME_DIST function
In this post, I would like to explain a function that is not well known. CUME_DIST analytic function is used for calculating the cumulative distribution of a data […]
More DetailsFOR UPDATE vs FOR UPDATE SKIP LOCKED
In this post, I am going to explain how FOR UPDATE and FOR UPDATE SKIP LOCKED clauses work. I would like to demonstrate it with a basic example. […]
More DetailsNVL vs COALESCE
As it is known, NVL and COALESCE functions are used in order to eliminate NULL values. However, NVL function is much more popular in comparison with the COALESCE. […]
More DetailsHow to use MULTISET UNION DISTINCT on collections
Let’s start with a basic example. Suppose, you have two PL/SQL collections with the same data type that you want to merge and remove the repetitive data. You […]
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