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Database版 - Help- A simple question about SQL
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1 (共1页)
t****n
发帖数: 4
1
Could anyone help me for the following question?
There is a table with gene_ids (‘gid’) and clone_ids (‘cid’). Each gene
only resides on a single clone and each clone may contain multiple genes. How
do you find how many genes are on each and every clone? Please provide the
SQL.
Many thanks!
T*****e
发帖数: 361
2
select cid, count(*) from t?

gene
How

【在 t****n 的大作中提到】
: Could anyone help me for the following question?
: There is a table with gene_ids (‘gid’) and clone_ids (‘cid’). Each gene
: only resides on a single clone and each clone may contain multiple genes. How
: do you find how many genes are on each and every clone? Please provide the
: SQL.
: Many thanks!

1 (共1页)
进入Database版参与讨论
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