Difference between revisions of "SQLZOO:About"
(Created page with "SQLZoo includes tutorials and reference to support people learning SQL. It features: *Interactive access to several SQL engines *Sample databases *Practical exercise *Instant ...") |
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Here is an example of a question: | Here is an example of a question: | ||
| − | ==Warming up== | + | ==Warming up== |
| − | <div class='qu'> | + | <div class='qu'> |
| − | [[Read the notes about this table.]] Observe the result of running a simple SQL command. | + | [[Read the notes about this table.]] Observe the result of running a simple SQL command. |
| − | <source lang='sql' class='def'> | + | <source lang='sql' class='def'> |
| − | SELECT name, region, population FROM bbc | + | SELECT name, region, population FROM bbc |
| − | </source> | + | </source> |
| − | <source lang='html'> | + | <source lang='html'> |
| − | <source lang='sql' class='ans'> | + | <source lang='sql' class='ans'> |
| − | SELECT name, region, population FROM bbc | + | SELECT name, region, population FROM bbc |
| − | </source> | + | </source> |
| − | </div> | + | </div> |
| − | + | ||
| − | ==Large Countries== | + | ==Large Countries== |
| − | <div class='qu'> | + | <div class='qu'> |
| − | Show the name for the countries that have a population of at least 200 million. (200 million is 200000000, there are eight zeros) | + | Show the name for the countries that have a population of at least 200 million. (200 million is 200000000, there are eight zeros) |
| − | <source lang='sql' class='def'> | + | <source lang='sql' class='def'> |
| − | SELECT name FROM bbc | + | SELECT name FROM bbc |
| − | WHERE population>250000000 | + | WHERE population>250000000 |
| − | </source> | + | </source> |
| − | + | ||
| − | <source lang='sql' class='ans'> | + | <source lang='sql' class='ans'> |
| − | SELECT name FROM bbc | + | SELECT name FROM bbc |
| − | WHERE population>200000000 | + | WHERE population>200000000 |
| − | </source> | + | </source> |
| − | </div | + | </div> |
| − | + | ||
Revision as of 22:58, 8 June 2012
SQLZoo includes tutorials and reference to support people learning SQL. It features:
- Interactive access to several SQL engines
- Sample databases
- Practical exercise
- Instant feedback on the success of the student's attempts
Format
Here is an example of a question:
==Warming up==
Read the notes about this table. Observe the result of running a simple SQL command.
SELECT name, region, population FROM bbc
Invalid language.
You need to specify a language like this: <source lang="html4strict">...</source>
Supported languages for syntax highlighting:
4cs, 6502acme, 6502kickass, 6502tasm, 68000devpac, abap, actionscript, actionscript3, ada, algol68, apache, applescript, apt_sources, asm, asp, autoconf, autohotkey, autoit, avisynth, awk, bascomavr, bash, basic4gl, bf, bibtex, blitzbasic, bnf, boo, c, c_loadrunner, c_mac, caddcl, cadlisp, cfdg, cfm, chaiscript, cil, clojure, cmake, cobol, coffeescript, cpp, cpp-qt, csharp, css, cuesheet, d, dcs, delphi, diff, div, dos, dot, e, ecmascript, eiffel, email, epc, erlang, euphoria, f1, falcon, fo, fortran, freebasic, fsharp, gambas, gdb, genero, genie, gettext, glsl, gml, gnuplot, go, groovy, gwbasic, haskell, hicest, hq9plus, html4strict, html5, icon, idl, ini, inno, intercal, io, j, java, java5, javascript, jquery, kixtart, klonec, klonecpp, latex, lb, lisp, llvm, locobasic, logtalk, lolcode, lotusformulas, lotusscript, lscript, lsl2, lua, m68k, magiksf, make, mapbasic, matlab, mirc, mmix, modula2, modula3, mpasm, mxml, mysql, newlisp, nsis, oberon2, objc, objeck, ocaml, ocaml-brief, oobas, oracle11, oracle8, oxygene, oz, pascal, pcre, per, perl, perl6, pf, php, php-brief, pic16, pike, pixelbender, pli, plsql, postgresql, povray, powerbuilder, powershell, proftpd, progress, prolog, properties, providex, purebasic, pycon, python, q, qbasic, rails, rebol, reg, robots, rpmspec, rsplus, ruby, sas, scala, scheme, scilab, sdlbasic, smalltalk, smarty, sql, systemverilog, tcl, teraterm, text, thinbasic, tsql, typoscript, unicon, uscript, vala, vb, vbnet, verilog, vhdl, vim, visualfoxpro, visualprolog, whitespace, whois, winbatch, xbasic, xml, xorg_conf, xpp, yaml, z80, zxbasic
<source lang='sql' class='ans'> SELECT name, region, population FROM bbc
==Large Countries==
Show the name for the countries that have a population of at least 200 million. (200 million is 200000000, there are eight zeros)
SELECT name FROM bbc WHERE population>250000000
SELECT name FROM bbc WHERE population>200000000