>>>>> DATABÁZE
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CREATE TABLE `studenti` (
  `id` int,
  `jmeno` varchar(60),
  `prijmeni` varchar(60),
  `pohlavi` varchar(1),
  `PLAT` int,
  `datum_narozeni` date,
  `mesto` varchar(20),
  `fakulta` int
);

insert into studenti values ('1', 'jana', 'krátka', 'f', '23500', '1954-12-22', 'Brno', '0');
insert into studenti values ('2', 'Jana', 'Nováková', 'F', '42261', '2016-11-11', 'Brno', '1');
insert into studenti values ('3', 'Sophia', 'Santiago', 'F', '20758', '1962-11-16', 'Brno', '8');
insert into studenti values ('4', 'Jarek', 'Benes', 'M', '52483', '2017-01-11', 'Praha', '8');
insert into studenti values ('5', 'Petr', 'Malý', 'M', '10000', '2001-09-23', 'Praha', '8');
insert into studenti values ('6', 'Honza', 'Adamec', 'M', '29990', '1977-07-27', 'Praha', '7');
insert into studenti values ('7', 'Petra', 'Adamcova', 'F', '23500', '1982-03-16', 'Olomouc', '6');
insert into studenti values ('8', 'Zuzka', 'Bezva', 'F', '39752', '2016-02-29', 'Ostrava', '7');
insert into studenti values ('9', 'Ivan', 'Sobota', 'M', '15274', '1900-02-01', 'Pardubice', '3');
insert into studenti values ('10', 'Petr', 'Novak', 'M', '27679', '2002-05-20', 'Zlin', '2');
insert into studenti values ('11', 'Jirka', 'Plavec', 'M', '23500', '2017-02-05', 'Opava', '1');
insert into studenti values ('12', 'Iva', 'Nováková', 'F', '25371', '2007-06-07', 'Opava', '0');
insert into studenti values ('14', 'Petr', 'Novak', 'M', '21072', '2011-06-15', 'Pardubice', '7');
insert into studenti values ('15', 'Iva', 'Nováková', 'F', '23181', '1994-02-13', 'Brno', '8');




--- INDEXY ----- tvorba tabulky



create table studenti2 (`jmeno` varchar (50), `prezdivka` varchar(50), index (prezdivka));

create table studenti3 (`jmeno` varchar (50), `prezdivka` varchar(50), unique (prezdivka));



--- INDEXY ----- do hotové tabulky

ALTER TABLE studenti add index (mesto);

ALTER TABLE studenti add unique (id)



--- INDEXY ----- smazat

ALTER TABLE studenti drop index mesto; 

ALTER TABLE studenti drop index id;