Make Custom User Authorization Schemes. Oracle Apex. Part-1

ORA-22858 invalid alteration of datatype

 

Change the data type of column 3 from VARCHAR2 (50) to CLOB while keeping the column order correct.

Step 1: Add Column 

	                    
                     
Alter Table Test_tble Add(Paragraph2 Clob);

--step 2: Update Column 

	                    
                     
Update Test_tble Set Paragraph2 = Paragraph

Step 3: Drop Old Name Column 

	                    
                     
Alter Table Test_tble Drop (Paragraph);

--Step 4: Rename The New Column To The Previous Name 

	                    
                     
Alter Table "Test_tble" Rename Column "Paragraph2" To "Paragraph"

 

🔗 Demo Application-
            URL- Demo Application
            Username - demo, Pass- demo
 

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Comment on any of your issues, I will try my best to solve the problem, In-Shah Allah. Everyone's cooperation is desirable.
Visit my blog site, new technology-related videos, you will get different types of tutorials of Oracle Apex, and hopefully, you can use them in your daily work.
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