mydb=# insert into testprimarykey values(2,'jerry');INSERT 0 1 mydb=# insert into testprimarykey values(3,'jimi');INSERT 0 1 mydb=# insert into testprimarykey values(1,'defan');ERROR: duplicate key value violates unique constraint"testprimarykey_pkey"DETAIL: Key (id)=(1) already e...
{COLUMNREF :fields ("sc" "degree") :location 26 } :location 26 } ) :fromClause ( {RANGEVAR :schemaname <> :relname student :inh true :relpersistence p :alias {ALIAS :aliasname st :colnames <> } :location 41 } {JOINEXPR :jointype 0 :isNatural false :larg {RANGEVAR :schemaname...
> > > The duplicate data included a created_at column which defaults to now() -- > that the two duplicate rows have exactly the same values strongly hints to > me that the duplicates were created during the same transaction. > > Here's the system column data you requested. > > id |...
remainder 0); create table hash_p2 partition of emp_hash_by_job for values with (modulus 4, remainder 1); create table hash_p3 partition of emp_hash_by_job
摘要:If the data in your tables do not have integrity, meaning there are missing rows, incorrect values, or duplicate rows, your table is not worth much. D 阅读全文 posted @ 2020-08-28 19:30 Zhentiw 阅读(149) 评论(0) 推荐(0) [...
But I think your problem is more fundamental - if you genuinely have duplicate values in a column - there should not be a unique constraint on it. If it should be unique, then you should modify your insert data. I Can't modify my insert data, because there's a PHP RANDOM CODE that...
(maxResults == SqlExecutor.NO_MAXIMUM_RESULTS || resultsFetched < maxResults) && rs.next()) { Object[] columnValues = resultMap.resolveSubMap(request, rs).getResults(request, rs); callback.handleResultObject(request, columnValues, rs); resultsFetched++; } } } finally { request.setResult...
In today’s E100 of “5mins of Postgres” we discuss how to optimize the row size in Postgres to reduce the overall table size. Specifically, we take a look at how column ordering affects storage size, how you can play column tetris to optimize it, and the big benefits that array-base...
Your Postgres commands in one place. Learn how to use psql to list and create Postgres databases, show your tables, enter your Postgres terminal, and more.
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