how to tune sql query in oracle

SQL Tune Report-sqltrpt. SQL, reportsqltrpt. SQL ORACLE 10 Gb provides a script sqltrpt. SQL to query the most resource-consuming SQL statem

After sqlserver2005, MSSQL began to use the recursive query method. Compare the methods for writing stored procedures or functions at the beginning. This method is simpler and more flexible. Oracle also has its own tree structure recursive query method, connect Next I will write a piece of SQL code by myself, and b

How does the column selection differ when Oracle queries are converted to SQL queries? The following describes how to select columns from Oracle query to SQL query. We hope that you can have a deeper understanding of

How can I convert Oracle queries to queries in the SQL database? The following describes how to convert an Oracle query to an SQL query. If you are interested in Oracle

First, simple query SQL (structured query Language) Structured Query language is a database query and programming language for accessing data and querying, updating, and managing relational database systems. ANSI (American National Standards Institute) claims that

When converting Oracle queries to SQL queries, you need to pay attention to a lot of issues. The following gives you a detailed analysis of the number trade-offs in converting Oracle queries to SQL queries for your reference. Number trade-offs Oracle Database has a TRUNC f

Steps for Oracle to execute SQL query statements and oraclesql query statements Steps for Oracle to execute SQL query statements If you enter the following

Oracle SQL query optimization for Oracle Data Scanning (2) 2. How to improve the performance of local range data scanning: 2.1 category and role of query conditions: When we initiate a SQL statement with conditions, multiple

, Administrativename,administrativeremark from Cet_administrativeoption (maxrecursion 0); GOOracle:1. From the root node to the child node:SELECT Administrativeid,administrativepid,administrativename,administrativeremark from Tadministrative START with Administrativepid is a NULL CONNECT by PRIOR Administrativeid=administrativepid;2. Query from child nodes to the root node:SELECT Administrativeid,administrativepid,administrativename,administrativerema

into' Student 'VALUES('8','Lee 48','123','male',' +','Jingan, Shanghai city'); INSERT into' Student 'VALUES('9','Zhang 39','111','male',' +','Shiyan, Hubei province'); INSERT into' Student 'VALUES('Ten','Lee 40','123','male',' +','Jingan, Shanghai city'); I. Querying 5~10 data MySQL Paging query: SELECT * FROM student limit 5, 10; Oracle Paging query: SELEC

Label:The first is the problem of fuzzy query, I started with the following conditions: SELECT * from the user where name like '% #value #% '. But how can not, as if also reported wrong. Later on the internet found a solution, is to use $ to replace the # number.1> write: Like '% $value $% ' can be,2> also found another method, but that method I tried for a long time, is not, the method is: like '% ' | | #value # | | '% ', the

Oracle experiences 1 -- oracle introduction @ basic SQL statement @ conditional query @ sort data theory and case studies1. Oracle IntroductionOracle is the first word for English translation of oracle (

and DELETE statements, SQL Server is going to maintain your nonclustered indexes. For your database, you just created an index of "pure" wasted space. On the other hand, you have satisfied the query optimizer by eliminating the missing index recommendation. But this is not the purpose: the goal is to create an index that will be used again.Conclusion: Never trust the q