oracle
How to improve Performance with Oracle SQL Join
The situation is I have to join more than 10 differ开发者_C百科ent table. In the SQL I am joining the same table 5 times. The query looks like this.[详细]
2023-04-12 18:57 分类：问答bulk collect in oracle
How to query bulk collection?If for example I have select name bulk collect into namesValues 开发者_StackOverflow中文版from table1[详细]
2023-04-12 18:52 分类：问答Cost of a query in/dependent of amount of data
Could you please tell me whether the cost of a query is dependent on the amount of data available in the databas开发者_如何学Goe at that time?[详细]
2023-04-12 18:49 分类：问答shrinking a column in oracle
Lets say i have a table with the following definition create table dummy (col1 number(9) not null) All the values开发者_Go百科 in this dummy.col1 are 7 digit long. Now i want to reduce the length o[详细]
2023-04-12 18:06 分类：问答Oracle - Computing lookup values for search screen
We currently have an Oracle table named tAttributes defined as: create table tAttributes { attribute_id integer not null,[详细]
2023-04-12 17:14 分类：问答whats is the importance of table alias in sql join query?
I wrote a sql join query in oracle with two table. While writing query I did not use any table alias to refer column in select clause.[详细]
2023-04-12 15:31 分类：问答same SQL concatenation opeartor for mysql,mssql,oracle
I am trying to use same sql statement for the above three DBMS .. but the problem is that it has string concatenation 开发者_高级运维involved but there are different ways in each dbms for concatenatio[详细]
2023-04-12 15:05 分类：问答PL/SQL send email with attachment?
we have a table with files saved as BLOB I write a code that email these files as an attachment! everything works fine so far, but the files (EXCEL,PDF, ... what ever) are not readable by the progra[详细]
2023-04-12 14:09 分类：问答Where is the spec for "grand total" in oracles group by grouping sets?
This is a valid sql statment for oracle 11 sql: select LASTNAME, SUM(ID) from PERSON group by grouping sets ((LASTNAME), ())[详细]
2023-04-12 13:09 分类：问答Formatting output of queries in SQLPlus
I\'m working with SQLPlus at the moment and whenever I query the Database, the result is in a complete mess. In other words, it is hard to read.I wonder if anyone knows how to format the output of que[详细]
2023-04-12 13:08 分类：问答
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