What is referential integrity in DB2 | What is Primary key | On Delete cascade | Restrict | Set null

We offer video tutorials and live sessions on TSO/ISPF, JCL, VSAM, COBOL, DB2, CICS, REXX, IMS DB, and Assembler. Some of our courses are priced lower than those on Udemy(my videos in Udemy), like Assembler, REXX, or IMS DB. Please confirm with me before making a purchase. If you're not from India, it might be easier to buy through Udemy for a more trustworthy and convenient payment process for both of us.
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