Tools that were used to create MySQL. InnoDB Cluster. InnoDB ReplicaSet. Error Messages and Common Problems. MySQL 8. Read a good book on Relational Theory. Database theory and practice have evolved since Edgar Codd originally defined the relational model back in Independent of any SQL products, SQL and Relational Theory draws on decades of research to present the most up-to-date treatment of the material available anywhere.
Anyone with a modest to advanced background in SQL will benefit from the many insights in this book. Oreilly January I really like just about anything Joe Celko has written Celko's Books. It's a littel outdated, but this book is really helpful is looking at how the differnt vendors implement things, I belive it includes ANSII standard. IMHO Your best bet will be to use several resources - specifically including at least one of for each DB platform you want to use.
While many of the examples in this quick reference may work on other databases, it is assumed that SQL Server is used, especially for advanced topics such as stored procedures. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow.
Learn more. Asked 12 years, 2 months ago. Active 8 years, 5 months ago. Viewed 43k times. Adrian Adrian 5, 10 10 gold badges 43 43 silver badges 68 68 bronze badges. What would be the point of having such a document? To actually use an actual database you need the document from the RDBMS producer with the product bias and product extensions. What are you trying to do? I usually try to avoid proprietary extensions if an Ansi SQL alternative is available.
The proprietary features are usually more efficient. I never use ansii standard if a better t-sql version is available. Since most databases don't implement the standard completely or with the same results for the same queries Oracle and SQl Server handle somethings differently and so the ANSII standard code will not always give the same results in both databases with the same records , using ANSII standard doesn't help you out much.
Not all the time. Sometimes they can be equivalent e. Oracle's join syntax dba-oracle. That said, I don't mean proprietary extensions are evil, just that the options should be considered.
Lott Adrian doesn't need a reason to ask the question. And any explanation he gives is irrelevant, as there can be others who have the same need for a different reason.
For example, this morning i am trying to implement a relational wrapper around an ISAM database. E, Character literals Oracle regards the zero-length literal '' as being null. Oracle requires either IS or AS after the return type and before the definition of the routine body, while the standard lacks these keywords.
Dynamic parameters are indicated by a colon followed by an identifier rather than a question mark. Oracle's row triggers are executed as the row is processed, instead of buffering them and executing all of them after processing all rows. The standard's semantics are deterministic, but Oracle's in-flight row triggers are more performant. Oracle's before row and before-statement triggers may perform DML statements, which is forbidden in the standard. On the other hand, Oracle's after-row statements may not perform DML, while it is permitted in the standard.
When multiple triggers apply, the standard says they are executed in order of definition; in Oracle the execution order is nondeterministic. We consider a feature of the standard to be fully supported if the only difference between Oracle and the standard is the spelling of the datatype name. Features X through X, basic table mappings: Oracle table mappings are available through a Java interface and through a package.
Oracle table mappings have been generalized to map queries and not just tables. That standard is no longer published. However, for users whose applications depend on information about the sizes of some database constructs that were defined in FIPS , we list the details of our compliance in Table B Table B Sizing for Database Constructs. Note 2: The FIPS PUB defines the length of a collection of columns to be the sum of: twice the number of columns, the length of each character column in bytes, decimal precision plus 1 of each exact numeric column, binary precision divided by 4 plus 1 of each approximate numeric column.
The maximum value of this parameter depends on the memory available on your operating system and exceeds in all cases. Oracle supports numerous features that extend beyond standard SQL. Oracle supports most national, international, and vendor-specific encoded character set standards. Unicode is a universal encoded character set that lets you store information from any language using a single character set.
Oracle Database complies fully with Unicode 3.
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