{"id":466,"date":"2021-09-01T13:11:47","date_gmt":"2021-09-01T11:11:47","guid":{"rendered":"http:\/\/vita.sk.vps202.nameserver.sk\/?post_type=product&#038;p=466"},"modified":"2025-07-31T20:08:23","modified_gmt":"2025-07-31T18:08:23","slug":"online-kurz-postgresql-ii-mierne-pokrocily","status":"publish","type":"product","link":"https:\/\/www.vita.sk\/en\/online-kurz-postgresql-ii-mierne-pokrocily\/","title":{"rendered":"Online kurz PostgreSQL II. Mierne Pokro\u010dil\u00fd"},"content":{"rendered":"<p>Online kurz PostgreSQL II. Mierne Pokro\u010dil\u00fd pre v\u00e1s ide\u00e1lny, ak sa chcete nau\u010di\u0165 efekt\u00edvne pracova\u0165 s datab\u00e1zami na vy\u0161\u0161ej \u00farovni vr\u00e1tane spr\u00e1vy rol\u00ed, privil\u00e9gi\u00ed, agreg\u00e1cie \u00fadajov, spojen\u00ed tabuliek a optimaliz\u00e1cie v\u00fdkonu. <strong>Ide o akreditovan\u00fd a certifikovan\u00fd online kurz na PostgreSQL.<\/strong> V kurze sa najsk\u00f4r nau\u010d\u00edte, ako vytvori\u0165 datab\u00e1zy, importova\u0165 d\u00e1ta z r\u00f4znych datasetov a exportova\u0165 \u00fadaje do extern\u00fdch form\u00e1tov pre \u010fal\u0161ie spracovanie. Podrobne si osvoj\u00edte z\u00e1klady administr\u00e1cie PostgreSQL, vr\u00e1tane spr\u00e1vy u\u017e\u00edvate\u013esk\u00fdch rol\u00ed a privil\u00e9gi\u00ed tak, aby bola va\u0161a datab\u00e1za bezpe\u010dn\u00e1, efekt\u00edvne nastaven\u00e1 a vhodn\u00e1 pre r\u00f4zne typy pou\u017e\u00edvate\u013eov. Prejdeme si preh\u013ead d\u00e1tov\u00fdch typov v PostgreSQL a ich limity, \u010do je nevyhnutn\u00e9 pre spr\u00e1vne modelovanie d\u00e1t. Nau\u010d\u00edte sa vyu\u017e\u00edva\u0165 agrega\u010dn\u00e9 funkcie ako SUM(), AVG(), COUNT() a zostavova\u0165 efekt\u00edvne SQL dopyty na anal\u00fdzu ve\u013ek\u00fdch objemov \u00fadajov. Ve\u013ek\u00e1 \u010das\u0165 kurzu je venovan\u00e1 spojeniam tabuliek (Joins), kde sa nau\u010d\u00edte, ako sp\u00e1ja\u0165 d\u00e1ta pomocou INNER JOIN, LEFT JOIN, RIGHT JOIN a FULL JOIN, a ako spr\u00e1vne \u010d\u00edta\u0165 pl\u00e1ny dopytov (EXPLAIN) na optimaliz\u00e1ciu v\u00fdkonu. Detailne si vysvetl\u00edme aj normaliz\u00e1ciu d\u00e1t, \u010do je k\u013e\u00fa\u010dov\u00e9 pre vytv\u00e1ranie dobre navrhnut\u00fdch datab\u00e1z. Kurz v\u00e1s nau\u010d\u00ed spravova\u0165 tabu\u013eky a rel\u00e1cie v PostgreSQL. Pracujeme s Task Managerom, u\u010d\u00edme sa pres\u00fava\u0165 tabu\u013eky medzi sch\u00e9mami, vytv\u00e1ra\u0165 do\u010dasn\u00e9 tabu\u013eky a spr\u00e1vne nastavova\u0165 pr\u00e1va cez Grant Wizard. Zist\u00edte, \u010do je to SuperUser re\u017eim, ak\u00e9 s\u00fa rizik\u00e1 a ako spr\u00e1vne konfigurova\u0165 pr\u00e1va v r\u00e1mci organiz\u00e1cie. Z\u00e1vere\u010dn\u00e1 \u010das\u0165 kurzu sa venuje anal\u00fdze v\u00fdkonu. Nau\u010d\u00edte sa pou\u017e\u00edva\u0165 modul pg_stat_statements na sledovanie dopytov a ich optimaliz\u00e1ciu, \u010do v\u00e1m pom\u00f4\u017ee v\u00fdrazne zn\u00ed\u017ei\u0165 z\u00e1\u0165a\u017e na server. Vysvetl\u00edme si tie\u017e pojmy ako TOAST (extern\u00e9 ukladanie ve\u013ek\u00fdch objektov), FSM (Free Space Map) a \u00fadr\u017ebov\u00e9 procesy ako VACUUM, ktor\u00e9 s\u00fa nevyhnutn\u00e9 pre udr\u017eanie dobr\u00e9ho v\u00fdkonu datab\u00e1zy. Tento kurz je ide\u00e1lny pre mierne pokro\u010dil\u00fdch pou\u017e\u00edvate\u013eov PostgreSQL, ktor\u00ed chc\u00fa svoje znalosti posun\u00fa\u0165 na vy\u0161\u0161iu \u00farove\u0148 a nau\u010di\u0165 sa efekt\u00edvne spravova\u0165, optimalizova\u0165 a analyzova\u0165 datab\u00e1zov\u00e9 syst\u00e9my v praxi. Ak sa chcete skuto\u010dne nau\u010di\u0165 pou\u017e\u00edva\u0165 PostgreSQL, tak toto je pre v\u00e1s skvel\u00fd online kurz.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Online kurz PostgreSQL II. Mierne Pokro\u010dil\u00fd pre v\u00e1s ide\u00e1lny, ak sa chcete nau\u010di\u0165 efekt\u00edvne pracova\u0165 s datab\u00e1zami na vy\u0161\u0161ej \u00farovni vr\u00e1tane spr\u00e1vy rol\u00ed, privil\u00e9gi\u00ed, agreg\u00e1cie \u00fadajov, spojen\u00ed tabuliek a optimaliz\u00e1cie v\u00fdkonu. Ide o akreditovan\u00fd a certifikovan\u00fd online kurz na PostgreSQL.","protected":false},"author":27,"featured_media":463,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[54,49,73],"product_tag":[188,207],"class_list":{"0":"post-466","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-online-kurzy-postgresql","7":"product_cat-online-kurzy-databazy-statistika-analytika","8":"product_cat-bez-kategorie","9":"product_tag-databazy-a-analytika","10":"product_tag-postgresql","12":"first","13":"instock","14":"sale","15":"sold-individually","16":"taxable","17":"shipping-taxable","18":"purchasable","19":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.0 (Yoast SEO v25.0) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Online kurz PostgreSQL pre mierne pokro\u010dil\u00fdch 2026 | VITA<\/title>\n<meta name=\"description\" content=\"Online kurz PostgreSQL II. 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Mierne Pokro\u010dil\u00fd v\u00e1s nau\u010d\u00ed pokro\u010dilej\u0161ie n\u00e1stroje a administr\u00e1ciu pou\u017e\u00edvate\u013eov a datab\u00e1z. \u2705\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.vita.sk\/online-kurz-postgresql-ii-mierne-pokrocily\/\" \/>\n<meta property=\"og:site_name\" content=\"VITA\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/VitaAcademySK\" \/>\n<meta property=\"article:modified_time\" content=\"2025-07-31T18:08:23+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.vita.sk\/wp-content\/uploads\/2018\/10\/postgre-sql.png\" \/>\n\t<meta property=\"og:image:width\" content=\"360\" \/>\n\t<meta property=\"og:image:height\" content=\"360\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\n\t    \"@context\": \"https:\/\/schema.org\",\n\t    \"@graph\": [\n\t        {\n\t            \"@type\": \"WebPage\",\n\t            \"@id\": \"https:\/\/www.vita.sk\/online-kurz-postgresql-ii-mierne-pokrocily\/\",\n\t            \"url\": \"https:\/\/www.vita.sk\/online-kurz-postgresql-ii-mierne-pokrocily\/\",\n\t            \"name\": \"Online kurz PostgreSQL pre mierne pokro\u010dil\u00fdch {Y} | VITA\",\n\t            \"isPartOf\": {\n\t                \"@id\": \"https:\/\/www.vita.sk\/#website\"\n\t            },\n\t            \"primaryImageOfPage\": {\n\t                \"@id\": \"https:\/\/www.vita.sk\/online-kurz-postgresql-ii-mierne-pokrocily\/#primaryimage\"\n\t            },\n\t            \"image\": {\n\t                \"@id\": \"https:\/\/www.vita.sk\/online-kurz-postgresql-ii-mierne-pokrocily\/#primaryimage\"\n\t            },\n\t            \"thumbnailUrl\": \"https:\/\/www.vita.sk\/wp-content\/uploads\/2018\/10\/postgre-sql.png\",\n\t            \"datePublished\": \"2021-09-01T11:11:47+00:00\",\n\t            \"dateModified\": \"2025-07-31T18:08:23+00:00\",\n\t            \"description\": \"Online kurz PostgreSQL II. 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