What is PSM database?
SQL/PSM (SQL/Persistent Stored Modules) is an ISO standard mainly defining an extension of SQL with a procedural language for use in stored procedures. It also defines an information schema (metadata) for stored procedures. SQL/PSM is one language in which methods for the SQL:1999 structured types can be defined.
What is the difference between SQL MySQL and SQL Server?
SQL is a query language, whereas MySQL is a relational database that uses SQL to query a database. SQL follows a standard format wherein the basic syntax and commands used for DBMS and RDBMS remain pretty much the same, whereas MySQL receives frequent updates.
What does ISO stand for in SQL?
The following documents of the International Organization for Standardization (ISO) relate to SQL: ISO/IEC 9075-1:2003, Information technology–Database languages–SQL–Part 1: Framework (SQL/Framework)
What is the procedural language for MySQL?
MySQL stored procedures are written in the MySQL stored program language, which is ANSI SQL:2003 compliant. It has a block structure similar to Oracle PL/SQL and IBM DB2 SQL. It is full featured, with statements used to manipulate variables, conditional execution, iterative processing and error handling.
When did SQL / PSM become an ISO standard?
SQL/PSM ( SQL /Persistent Stored Modules) is an ISO standard mainly defining an extension of SQL with a procedural language for use in stored procedures. Initially published in 1996 as an extension of SQL-92 (ISO/IEC 9075-4:1996, a version sometimes called PSM-96 or even SQL-92/PSM ), SQL/PSM was later incorporated into…
What do you need to know about SQL / PSM?
SQL/PSM standardizes syntax and semantics for control flow, exception handling (called “condition handling” in SQL/PSM), local variables, assignment of expressions to variables and parameters, and (procedural) use of cursors.
Is the SQL / PSM facility still optional in SQL?
The SQL/PSM facilities are still optional as far as the SQL standard is concerned; most of them are grouped in Features P001-P008.
Why was SQL 1999 Part 4 not included in PSM-96?
The SQL:1999 part 4 covered less than the original PSM-96 because the SQL statements for defining, managing, and invoking routines were actually incorporated into part 2 SQL/Foundation, leaving only the procedural language itself as SQL/PSM.