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History. SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd [12] in the early 1970s. [13] .
- Ted Codd and The Relational Data Model
- System R
- A Query Language For Relational Databases
- The Query Game
- SQL Becomes Industry Standard
The first computer databases appeared in the late 1960s. This was an important area of research at the time. Many computer scientists were focused on improving how databases work. One of them was Edgar Frank (Ted) Codd, an English computer scientist employed at IBM. Back in the 1940s, he took part in the Selective Sequence Electronic Calculatorproj...
Codd’s model was not immediately successful. IBM was not eager to implement his suggestions. At the time, they had IMS, a very successful hierarchical database. They didn't want to undermine their revenue from IMS by building a competing product. (IMS is still developed today, which shows how successful it was.) It wasn’t until 1973 that IBM starte...
Joins in Codd’s article In his seminal article, Codd proposed a set of operations that could be used to extract data from relations. You can think of these operations as the first query language for relational databases. Of course, the syntax was completely different from the SQL we know today; Codd used mathematical notation for this language. Mos...
Even before the System R project started, Chamberlin and Boyce came up with a language they called SQUARE(Specifying Queries as Relational Expressions). They appreciated the power of Codd’s ideas, which allowed them to use a few lines to express complex queries that would take pages in a hierarchical database. However, they were convinced that thei...
Over the years, SQL has become an industry standard. For now, it is enough to say that SQL has become the basic language for working with databases. It has been recognized by all important organizations, and market giants such as Google and Facebook use it on a daily basis for many processes. SQL and databases are currently one of the fastest growi...
- Agnieszka Kozubek-Krycuń
SQL was first developed in the early 1970s at IBM by a team led by Donald D. Chamberlin and Raymond F. Boyce. The original name of the language was SEQUEL, which stood for "Structured English Query Language."
Dec 4, 2023 · Early 1970s: The history of SQL begins with Dr. Edgar Frank Codd, a computer scientist working at IBM. In 1970, he published a seminal paper titled “A Relational Model of Data for Large Shared...
Dec 8, 2020 · The first SQL standard was SQL-86. It was published in 1986 as ANSI standard and in 1987 as International Organization for Standardization (ISO) standard. The starting point for the ISO standard was IBM’s SQL standard implementation. This version of the SQL standard is also known as SQL 1.
- Agnieszka Kozubek-Krycuń
Jan 17, 2024 · Recognizing the need for standardization, ANSI (American National Standards Institute) formed a committee in 1981 to create a standard SQL specification. This effort resulted in the SQL-86 standard, the first formal definition of the SQL language in 1986 5.
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History of SQL. Dr. E. F. Codd published the paper, "A Relational Model of Data for Large Shared Data Banks", in June 1970 in the Association of Computer Machinery (ACM) journal, Communications of the ACM. Codd's model is now accepted as the definitive model for relational database management systems (RDBMS).
