Popeye questions

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• Oracle SQL how to get the group by columns along with other selected columns
• How can I select a nested json object with a group by clause in oracle sql from a table?
• oracle regular expression to check string contains both alphabet and number and does not contain special characters
• How to get first row of data for each month (postgres)
• How to find column name that contains specific string value using oracle
• How to print the cursor values in oracle?
• What is the difference TO_DATE('21-09-1989','DD-MM-YY') and TO_DATE('21-09-89','DD-MM-YY')?
• How to change a column data type in Oracle View? [duplicate]
• Oracle SQL "column ambiguously defined" with `FETCH FIRST n ROWS ONLY`
• Can I use INSERT ALL with multiple recordtype variables?