mysql - Sample datasets for practice - Oracle pl/sql -

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i new user of sql, use oracle pl/sql programming software. have done introductory course sql included datasets. i'd continue practicing, real life problems include requests of querying simple statements difficult ones include indexes, etc.

does have links/sites can further pursue sql training free? i've done stakexchange , google search not luck.

as know, oracle ussually comes sample schemas hr, sh... listed here also, can install hammerora benchmarking tool. it's commonly used test tpc-c , tpc-h on different rdbms. install schemas on db variable size. can install virtual appliances. there more there, think coolest stackoverflow db, bad mssql.


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