I need to update multiple columns of a table t1 with random rows from another table t2. t1 has ~ 1 Million Rows, t2 has 50k

I need to update multiple columns of a table t1 with random rows from another table t2. t1 has ~ 1 Million Rows, t2 has 50k

I need to update multiple columns of a table t1 with random rows from another table t2. t1 has ~ 1 Million Rows, t2 has 50k

I need to update multiple columns of a table t1 with random rows from another table t2. t1 has ~ 1 Million Rows, t2 has 50k

I want to filter the data based on the country matrix of the recruiter (user) rather than the logged-in user’s ID.The query should fetch the data based on the country matrix of the recruiter associated with the candidates.
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But i’m getting the same result for all user.Please help me to solve this.

I have a table with three columns: job_id, part, and time, which represent the ID of a shop job, the part manufactured in that job, and the time taken for that job, respectively.

Closed 5 days ago.

I have a table with tax rates. Each tax rate has two date fields: ‘valid_from’ and ‘valid_to’. ‘valid_to’ can be NULL, then the tax rate is valid until a later tax rate is inserted. Now I want to determine all tax rates valid in a given period with :start_date and :end_date. The problem is that a tax rate without ‘valid_to’ is valid, viewed individually, as long as its valid_from is not after the given period. So I have to take into account whether such tax rates have been replaced by later tax rates. But it can also be the case that a tax rate with valid_to = NULL falls in part of the given period and then a new tax rate takes over the next part of the period.
My approach still has problems with this:

For the following sql query statements: Select Distinct sno, sname From Student, SC Where Student.sno=SC.sno And cno=’C001′ Please use common sense to determine which of the following query plans should be executed most efficiently? (Assuming the SC has a citation on the cno and the Student has an index on the snoo) ()

For the following sql query statements: Select Distinct sno, sname From Student, SC Where Student.sno=SC.sno And cno=’C001′ Please use common sense to determine which of the following query plans should be executed most efficiently? (Assuming the SC has a citation on the cno and the Student has an index on the snoo) ()