Oracle Listener how to handle error message ORA 12541 TNS no listener 

Hey, I'm new in SQL. I've created DB,Users & Tables in Oracle also I've used 7-8 days and inserted approx 7Lakhs data in my db, suddenly I'm getting error like" ORA-12514: TNS:listener does not currently know of service requested in connect descriptor " and also TNS Admin environment variable is not defined." Please help me to resolve this error. NOt able to login also.

You did a great job explaining everything calmly and I thank you for that!

it worked for me thanks 🙏 I was so close to get 0 in my assignments as oracle was not starting but you saved me .

Failed to start the listener service , error 3:the system cannot find the path specified . Please slove why this problem happen

thanks you are angel really helped me a lot waste 2 hours on this problem.

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Thank you!! I forget run cmd as administrator. Resolved!

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Bro when I'm typing lsrnctl start it's giving unable to open SCManager err 203 and giving protocol adapter error please help bro?

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mine its showing listener using listener name LISTENER has already been started. and same error exits..please solve the problem

Namashte..... its working, thank you

I have this error ORA-12514: TNS:listener does not currently know of service requested in connect

Solved my problem, Thank you so much

Thanks for the video but in my case is asking me for the sys's password I put my PC password but it say incorrect, which password do I have to use? Once again thanks for your help

Solved my problem. Thank you

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This tool is missing for me.

Nice clear the problem. Thank You

Getting this listener problem while connecting to Oracle from power bi.

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Still not start Oracle listener

Awesome

Thank you bro/sis

Mine still not working 😭

Thanks a lot!

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Thanks

Thank you alots

Does not work at all.

Thank's man i had a problem with super slow working listener but your video helped I Had to big file:$ORACLE_BASE\diag\tnslsnr\\listener\trace\listener.log I stopped listener service, delete listener.log and start listener service

Solved my problem. Thank you