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Hi,<br />
<br />
I am a java developer. I am trying to improve my SQL and PLSql skills. I see big queries complex entity relationships,references, cardinality etc. I am also working with cursors, stored procedures, functions etc lot these days. How to improve my query writing skills and query analyzing skills specially when queries are 2,3 page long. I am unable to visualize in my mind how the table data looks like if i insert the data using those specific query before inserting. Any ideas, links, resources, sample code highly appreciated. thanks in advance
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Hi,

I am a java developer. I am trying to improve my SQL and PLSql skills. I see big queries complex entity relationships,references, cardinality etc. I am also working with cursors, stored procedures, functions etc lot these days. How to improve my query writing skills and query analyzing skills specially when queries are 2,3 page long. I am unable to visualize in my mind how the table data looks like if i insert the data using those specific query before inserting. Any ideas, links, resources, sample code highly appreciated. thanks in advance

SQL and PLSql skills

Oracle is an object-relational database management system. It supports a large number of languages and application development frameworks. Its primary languages are SQL, PL/SQL and Java, but it also includes support for C and C++. Oracle also has its own enterprise modules and application server software.

Oracle Database

IBM DB2 is a family of relational database server products developed by IBM that have been extended to support object-relational features and non-relational structures like JSON and XML. There are three main products in the DB2 family: DB2 for Linux, UNIX and Windows (informally known as DB2 LUW), DB2 for z/OS (mainframe), and DB2 for i (formerly OS/400), plus a version for IBM's Virtual Storage Extended (VSE) operating system.

SQL (Structured Query Language) is designed to be used in conjunction with relational database products as of a means of working with sets of data. SQL consists of data definition, data manipulation, and procedural elements. Its scope includes data insert, query, update and delete, schema creation and modification, and data access control.