
Greg L. Turnquist
32.5K posts

Greg L. Turnquist
@gregturn
Sr. Staff Technical Content Engineer @CockroachDB, Best-Selling Author, Conference Speaker, YouTube Content Creator.







How is this legal - American finances a truck that cost $111,916 - He’s made 84 payments of $1,898.39 - The amount he will pay for the truck after all payments are made is $159,464 I don’t care what anyone says this is usery and the bankers doing this should be locked up





When did you join the Java gang? ☕ Was it love at first JDK download? 😍 #Java30Countdown #Java30









Dig the past, find surprises. 👀 #Java30Countdown #Java30




The original SEQUEL paper from 1974 is mostly focused on the "console language" use case that Uncle Bob highlighted. Used in this way, SEQUEL enabled direct querying by business analysts that wouldn't know what Edgar Codd meant by "first-order predicate calculus" in his relational database papers. In fact, the language is called SEQUEL because the previous language SQUARE used terse math-like syntax, and this was considered too difficult for such non-technical business users. SEQUEL was made more verbose and English-like to be more approachable to non-technical business folks that might only run a few queries a year. Other tools designed with this target audience include COBOL, CODASYL data languages, and the RPG language. While the paper doesn’t mention embedding SQL explicitly, it does make a few implicit references that hint that this was perhaps under consideration as a future enhancement. First, the introduction opens as follows: As computer systems become more advanced, we see a gradual evolution from procedural to declarative problem specification. There are two major reasons for this evolution. First, a means must be found to lower software costs among professional programmers. The costs of program creation, maintenance, and modification have been rising very rapidly. The concepts of structured programming have been introduced in order to simplify programming and reduce the cost of software. Secondly, there is an increasing need to bring the non-professional user into effective communication with a formatted data base. Much of the success of the computer industry depends on developing a class of users other than trained computer specialists. The paper then goes on to focus on the second reason. However, the introduction begs the question: might SEQUEL also be somehow used to simplify programming and reduce the cost of software? Additionally, the paper calls SEQUEL a "sublanguage." Does a sublanguage imply a superlanguage? If so, that term might be 1970s for "embeddable DSL." Given the fact that relational databases were considered a next-gen CODASYL, and CODASYL was an evolution from the DATA DIVISION in a COBOL program, it seems very likely that embeddability in host languages was in the mind of IBM Researchers. Source: dl.acm.org/doi/10.1145/80…




