It's all about the background. For HLL and even basic programmers grasping SQL poses little-to-no challenges. Some are even falling in love with SQL despite som

It's all about the background. For HLL and even basic programmers grasping SQL poses little-to-no challenges. Some are even falling in love with SQL despite some minor inconsistencies and prolix wordy verbosity and asking for writing more SQL. In contrast, users of, for example, the lingo where object minus object equals NaN are terrified when suddenly exposed to type zoo like https://www.postgresql.org/docs/9.5/datatype.html https://www.postgresql.org/docs/9.5/datatype.html (Disclaimer: a relatively randomly chosen example, neither endorsement nor preference of particular RDBMS/dialect). And let's keep in mind what types above form a structures and these structures getting manipulated en mass as intrinsically unordered sets (which are data types too!). That is, a leap from barely existing concept of data types to circa 30% of DDL/DML keeps scripters out of SQL. So the reason behind that endless «SQL bad» teeth gnashing turns out to be very simple.