{"id":44170,"date":"2026-01-02T07:17:00","date_gmt":"2026-01-02T06:17:00","guid":{"rendered":"https:\/\/www.derivaty.sk\/?p=44170"},"modified":"2026-01-05T14:03:11","modified_gmt":"2026-01-05T13:03:11","slug":"databazove-integrace-propojeni-aplikaci-s-databazemi","status":"publish","type":"post","link":"https:\/\/www.autoskoly.sk\/news\/databazove-integrace-propojeni-aplikaci-s-databazemi\/","title":{"rendered":"Datab\u00e1zov\u00e9 integrace: Propojen\u00ed aplikac\u00ed s datab\u00e1zemi"},"content":{"rendered":"<h2>Datab\u00e1zov\u00e9 integrace: p\u0159ehled, c\u00edle a kontext<\/h2>\n<p>Datab\u00e1zov\u00e1 integrace je soubor technik, vzor\u016f a n\u00e1stroj\u016f, kter\u00fd umo\u017e\u0148uje bezpe\u010dnou, spolehlivou a efektivn\u00ed v\u00fdm\u011bnu dat mezi syst\u00e9my. Zahrnuje jednor\u00e1zov\u00e9 i kontinu\u00e1ln\u00ed propojen\u00ed OLTP a OLAP platforem, synchronizaci mezi monolity a mikroslu\u017ebami, napojen\u00ed na datov\u00e1 jezera, stejn\u011b jako federaci dotaz\u016f a virtualizaci. C\u00edlem je zajistit konzistenci, kvalitu, dohledatelnost a v\u010dasnost dat bez nadm\u011brn\u00e9 provozn\u00ed z\u00e1t\u011b\u017ee a rizik pro dostupnost kl\u00ed\u010dov\u00fdch syst\u00e9m\u016f.<\/p>\n<h2>Architektonick\u00e9 p\u0159\u00edstupy k integraci<\/h2>\n<ul>\n<li><strong>Point-to-Point (ad hoc)<\/strong> \u2013 rychl\u00e9 napojen\u00ed mezi dv\u011bma syst\u00e9my, n\u00edzk\u00e1 po\u010d\u00e1te\u010dn\u00ed slo\u017eitost, ale \u0161patn\u011b \u0161k\u00e1luje (vznik \u201epavouka\u201c).<\/li>\n<li><strong>Integra\u010dn\u00ed p\u00e1te\u0159 \/ ESB<\/strong> \u2013 centralizace transformac\u00ed a sm\u011brov\u00e1n\u00ed zpr\u00e1v; vhodn\u00e9 pro heterogenn\u00ed prost\u0159ed\u00ed, riziko \u201esingle point of governance\u201c.<\/li>\n<li><strong>Event-driven (asynchronn\u00ed)<\/strong> \u2013 publish\/subscribe p\u0159es broker; n\u00edzk\u00e9 vazby, dobr\u00e1 \u0161k\u00e1lovatelnost a audit proud\u016f.<\/li>\n<li><strong>Data Mesh<\/strong> \u2013 dom\u00e9nov\u011b orientovan\u00e1 spr\u00e1va dat jako produktu; federovan\u00e1 odpov\u011bdnost a standardy mezi t\u00fdmy.<\/li>\n<li><strong>ELT\/ETL do DWH\/Data Lake<\/strong> \u2013 konsolidace pro analytiku, reporting a ML, d\u016fraz na liniii p\u016fvodu a kvalitu.<\/li>\n<li><strong>Federace a virtualizace<\/strong> \u2013 jednotn\u00e1 vrstva pro dotazy nad v\u00edcero zdroji bez p\u0159esunu dat (v\u00fdhody v rychlosti nasazen\u00ed, limity ve v\u00fdkonu a latenci).<\/li>\n<\/ul>\n<h2>Vzory integrace dat<\/h2>\n<ul>\n<li><strong>ETL (Extract\u2013Transform\u2013Load)<\/strong> \u2013 transformace p\u0159ed ulo\u017een\u00edm; vhodn\u00e9 pro slo\u017eit\u00e9 business logiky a \u010di\u0161t\u011bn\u00ed.<\/li>\n<li><strong>ELT (Extract\u2013Load\u2013Transform)<\/strong> \u2013 vyu\u017eit\u00ed v\u00fdkonu c\u00edlov\u00e9ho enginu (DWH\/Lakehouse) pro transformace; vy\u0161\u0161\u00ed flexibilita a auditovatelnost.<\/li>\n<li><strong>CDC (Change Data Capture)<\/strong> \u2013 replikace zm\u011bn z transak\u010dn\u00edch log\u016f (insert\/update\/delete) do odb\u011bratel\u016f v re\u00e1ln\u00e9m \u010dase.<\/li>\n<li><strong>Synchronizace (Merge\/Upsert)<\/strong> \u2013 periodick\u00e9 srovn\u00e1n\u00ed zdroje a c\u00edle s idempotentn\u00edm updatem.<\/li>\n<li><strong>Replikace<\/strong> \u2013 master\u2013replica, multi-primary, log-based \u010di trigger-based; pro \u0161k\u00e1lov\u00e1n\u00ed \u010dten\u00ed i geografickou dostupnost.<\/li>\n<li><strong>Event Sourcing<\/strong> \u2013 ulo\u017een\u00ed ud\u00e1lost\u00ed jako zdroje pravdy; projekce pro \u010dtec\u00ed modely.<\/li>\n<\/ul>\n<h2>Batch vs. streaming a volba latence<\/h2>\n<table>\n<thead>\n<tr>\n<th>P\u0159\u00edstup<\/th>\n<th>Latence<\/th>\n<th>Typick\u00e9 pou\u017eit\u00ed<\/th>\n<th>V\u00fdhody<\/th>\n<th>Rizika<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Batch<\/td>\n<td>Minuty\u2013hodiny<\/td>\n<td>No\u010dn\u00ed na\u010d\u00edt\u00e1n\u00ed do DWH, \u00fa\u010detn\u00ed z\u00e1v\u011brky<\/td>\n<td>Jednoduchost, men\u0161\u00ed n\u00e1roky na orchestraci<\/td>\n<td>Neaktu\u00e1ln\u00ed data, \u0161pi\u010dkov\u00e9 zat\u00ed\u017een\u00ed<\/td>\n<\/tr>\n<tr>\n<td>Micro-batch<\/td>\n<td>Des\u00edtky sekund<\/td>\n<td>Dashboardy, t\u00e9m\u011b\u0159 \u017eiv\u00e9 p\u0159ehledy<\/td>\n<td>Dobr\u00e1 rovnov\u00e1ha v\u00fdkon\/aktu\u00e1lnost<\/td>\n<td>Slo\u017eit\u011bj\u0161\u00ed monitoring<\/td>\n<\/tr>\n<tr>\n<td>Streaming<\/td>\n<td>Ms\u2013sekundy<\/td>\n<td>Antifraud, doporu\u010dov\u00e1n\u00ed, operational analytics<\/td>\n<td>Re\u00e1ln\u00fd \u010das, jemnozrnn\u00e1 \u0161k\u00e1lovatelnost<\/td>\n<td>Komplexita, p\u0159esn\u011b-jednou semantika je n\u00e1ro\u010dn\u00e1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Konzistence, transakce a odolnost<\/h2>\n<ul>\n<li><strong>ACID vs. BASE<\/strong> \u2013 OLTP syst\u00e9my preferuj\u00ed ACID; distribuovan\u00e9 slu\u017eby \u010dasto akceptuj\u00ed eventual consistency.<\/li>\n<li><strong>Izolace<\/strong> \u2013 READ COMMITTED, REPEATABLE READ, SNAPSHOT, SERIALIZABLE; vliv na phantom reads a deadlocky.<\/li>\n<li><strong>2PC\/3PC vs. Saga<\/strong> \u2013 siln\u00e1 konzistence nap\u0159\u00ed\u010d zdroji (2PC) vs. orchestrace\/chorografie kompenza\u010dn\u00edch krok\u016f (Saga) pro \u0161k\u00e1lovateln\u011bj\u0161\u00ed odolnost.<\/li>\n<li><strong>Idempotence a deduplikace<\/strong> \u2013 kl\u00ed\u010d k bezpe\u010dn\u00fdm retri\u016fm; vyu\u017eit\u00ed p\u0159\u00edrodn\u00edch kl\u00ed\u010d\u016f, hash\u016f nebo <em>idempotency keys<\/em>.<\/li>\n<li><strong>Backpressure a rate limiting<\/strong> \u2013 ochrana c\u00edlov\u00fdch syst\u00e9m\u016f, adaptivn\u00ed okna a fronty.<\/li>\n<\/ul>\n<h2>Modelov\u00e1n\u00ed a kanonick\u00e9 datov\u00e9 modely<\/h2>\n<p>Kvalitn\u00ed integrace stav\u00ed na stabiln\u00edch sch\u00e9matech. Kanonick\u00fd model zmen\u0161uje po\u010det transformac\u00ed a chr\u00e1n\u00ed integrace p\u0159ed \u010dast\u00fdmi zm\u011bnami zdroj\u016f.<\/p>\n<ul>\n<li><strong>Normalizace vs. denormalizace<\/strong> \u2013 OLTP (3NF) pro integritu, OLAP (hv\u011bzda\/sn\u00edh) pro rychl\u00e9 agregace.<\/li>\n<li><strong>Sch\u00e9ma jako kontrakt<\/strong> \u2013 <em>schema registry<\/em>, verzov\u00e1n\u00ed sch\u00e9mat (semver), kompatibilita <em>backward\/forward<\/em>.<\/li>\n<li><strong>MDM (Master Data Management)<\/strong> \u2013 zlat\u00e9 z\u00e1znamy, slu\u010dov\u00e1n\u00ed duplicit, hierarchie z\u00e1kazn\u00edk\u016f a produkt\u016f.<\/li>\n<li><strong>Reference data<\/strong> \u2013 \u0159\u00edzen\u00e9 slovn\u00edky a k\u00f3dy; jednotn\u00e9 \u010d\u00edseln\u00edky pro mapov\u00e1n\u00ed mezi syst\u00e9my.<\/li>\n<\/ul>\n<h2>Datov\u00e1 kvalita, linie p\u016fvodu a governance<\/h2>\n<ul>\n<li><strong>Data Quality (DQ) pravidla<\/strong> \u2013 povinn\u00e9 atributy, rozsahy, regexy, referen\u010dn\u00ed integrita, anom\u00e1lie v \u010dase.<\/li>\n<li><strong>Lineage<\/strong> \u2013 dohledateln\u00fd p\u016fvod a transformace; dopad anal\u00fdzy p\u0159i zm\u011bn\u00e1ch.<\/li>\n<li><strong>Katalog dat<\/strong> \u2013 technick\u00e9 i obchodn\u00ed metadata, vlastn\u00edk dat, klasifikace citlivosti.<\/li>\n<li><strong>SLAs\/SLOs<\/strong> \u2013 v\u010dasnost, \u010derstvost, spolehlivost pipeline, c\u00edle obnovy (RPO\/RTO).<\/li>\n<\/ul>\n<h2>Bezpe\u010dnost a soukrom\u00ed v integra\u010dn\u00edch toc\u00edch<\/h2>\n<ul>\n<li><strong>Autentizace a autorizace<\/strong> \u2013 princip nejmen\u0161\u00edch opr\u00e1vn\u011bn\u00ed, <em>service accounts<\/em>, rotace tajemstv\u00ed.<\/li>\n<li><strong>\u0160ifrov\u00e1n\u00ed<\/strong> \u2013 v klidu (TDE, KMS\/HSM), p\u0159i p\u0159enosu (TLS), \u0159\u00edzen\u00ed p\u0159\u00edstupu ke kl\u00ed\u010d\u016fm.<\/li>\n<li><strong>Maskov\u00e1n\u00ed a tokenizace<\/strong> \u2013 pseudonymizace osobn\u00edch \u00fadaj\u016f, <em>role-based views<\/em>.<\/li>\n<li><strong>Audit a forenzn\u00ed p\u0159ipravenost<\/strong> \u2013 nezm\u011bniteln\u00e9 logy, konsolidace do SIEM, korelace s aplika\u010dn\u00edmi ud\u00e1lostmi.<\/li>\n<li><strong>Regulace<\/strong> \u2013 GDPR principy (minimalizace, \u00fa\u010del, omezen\u00e1 retence), datov\u00e9 dohody mezi t\u00fdmy a dodavateli.<\/li>\n<\/ul>\n<h2>V\u00fdkon, \u0161k\u00e1lov\u00e1n\u00ed a optimalizace<\/h2>\n<ul>\n<li><strong>Indexy, partitioning, sharding<\/strong> \u2013 spr\u00e1vn\u00e9 volby kl\u00ed\u010d\u016f pro range\/hash; vyhnout se hotspot\u016fm.<\/li>\n<li><strong>Inkrement\u00e1ln\u00ed na\u010d\u00edt\u00e1n\u00ed<\/strong> \u2013 timestampy, <em>watermarky<\/em>, log-based CDC; minimalizace full scan\u016f.<\/li>\n<li><strong>Caching<\/strong> \u2013 read-through, write-through, invalidace; v\u011bdom\u00ed konzistence cache vs. zdroj.<\/li>\n<li><strong>Orchestrace<\/strong> \u2013 paralelizace krok\u016f, z\u00e1vislosti DAG, prioritizace kritick\u00fdch proud\u016f.<\/li>\n<li><strong>Tuning driver\u016f a konektor\u016f<\/strong> \u2013 velikost batch\u016f, pipelining, komprese, <em>prefetch<\/em>, \u0159\u00edzen\u00ed MTU v s\u00edt\u00edch s vysokou latenc\u00ed.<\/li>\n<\/ul>\n<h2>Testov\u00e1n\u00ed, validace a nasazov\u00e1n\u00ed<\/h2>\n<ul>\n<li><strong>Kontraktov\u00e9 testy<\/strong> \u2013 validace sch\u00e9mat a o\u010dek\u00e1v\u00e1n\u00ed mezi poskytovatelem a odb\u011bratelem.<\/li>\n<li><strong>Seed a syntetick\u00e1 data<\/strong> \u2013 generov\u00e1n\u00ed realistick\u00fdch dat s ochranou soukrom\u00ed.<\/li>\n<li><strong>Rekonciliace<\/strong> \u2013 porovn\u00e1n\u00ed po\u010dt\u016f \u0159\u00e1dk\u016f, kontroln\u00edch sou\u010dt\u016f a hash\u016f mezi zdrojem a c\u00edlem.<\/li>\n<li><strong>Blue\/Green a Canary<\/strong> \u2013 postupn\u00e9 p\u0159ep\u00edn\u00e1n\u00ed odb\u011bratel\u016f na novou verzi pipeline.<\/li>\n<li><strong>Migra\u010dn\u00ed strategie<\/strong> \u2013 dual-write s guard-raily, <em>shadow reads<\/em>, pl\u00e1ny n\u00e1vratu (rollback).<\/li>\n<\/ul>\n<h2>Chybov\u00e9 sc\u00e9n\u00e1\u0159e a jejich zvl\u00e1d\u00e1n\u00ed<\/h2>\n<ul>\n<li><strong>Po\u0161kozen\u00e9 zpr\u00e1vy<\/strong> \u2013 dead-letter queue, karant\u00e9na, manu\u00e1ln\u00ed reprocess s n\u00e1stroji pro n\u00e1hled.<\/li>\n<li><strong>Nekonzistentn\u00ed aktualizace<\/strong> \u2013 s\u00e1gy s kompenzacemi, idempotentn\u00ed upsert, <em>at-least-once<\/em> vs. <em>exactly-once<\/em> trade-off.<\/li>\n<li><strong>Kolize sch\u00e9mat<\/strong> \u2013 verze sch\u00e9mat, <em>feature flags<\/em> pro nov\u00e9 sloupce, transformace na hran\u00e1ch.<\/li>\n<li><strong>Zpo\u017ed\u011bn\u00ed a v\u00fdpadky<\/strong> \u2013 backoff retry, circuit breaker, <em>grace windows<\/em> pro pozdn\u00ed data.<\/li>\n<\/ul>\n<h2>Technologick\u00e1 skladi\u0161t\u011b a konektory<\/h2>\n<ul>\n<li><strong>Rela\u010dn\u00ed datab\u00e1ze<\/strong> \u2013 PostgreSQL, MySQL, SQL Server, Oracle; standardn\u00ed JDBC\/ODBC, log-based CDC konektory.<\/li>\n<li><strong>NoSQL<\/strong> \u2013 dokumentov\u00e9, kl\u00ed\u010d-hodnota, \u0161irok\u00e9 sloupce, grafy; specifick\u00e9 API a vzory pro konsistenci.<\/li>\n<li><strong>Streamovac\u00ed platformy<\/strong> \u2013 publika\u010dn\u00ed\/odb\u011bratelsk\u00e9 modely, sch\u00e9mata zpr\u00e1v (Avro\/Protobuf\/JSON), <em>schema registry<\/em>.<\/li>\n<li><strong>Data Lake\/Lakehouse<\/strong> \u2013 transak\u010dn\u00ed form\u00e1ty tabulek (tabul\u00e1rn\u00ed metadatov\u00e9 vrstvy), ACID na objektov\u00fdch \u00falo\u017ei\u0161t\u00edch.<\/li>\n<li><strong>Virtualiza\u010dn\u00ed vrstvy<\/strong> \u2013 federovan\u00e9 dotazy, push-down predik\u00e1t\u016f, spr\u00e1va opr\u00e1vn\u011bn\u00ed nap\u0159\u00ed\u010d zdroji.<\/li>\n<\/ul>\n<h2>API, kontrakty a dom\u00e9nov\u00e1 rozhran\u00ed<\/h2>\n<p>Datab\u00e1zov\u00e1 integrace nemus\u00ed znamenat p\u0159\u00edm\u00fd p\u0159\u00edstup do tabulek. \u010casto je vhodn\u011bj\u0161\u00ed poskytovat data p\u0159es stabiln\u00ed dom\u00e9nov\u00e1 API s jasnou semantikou:<\/p>\n<ul>\n<li><strong>Read-only API pro analytiku<\/strong> \u2013 materializovan\u00e9 pohledy a agregace, throttling a caching.<\/li>\n<li><strong>Eventy jako API<\/strong> \u2013 zm\u011bny ve zdrojov\u00e9m syst\u00e9mu emitovan\u00e9 jako ud\u00e1losti (CRUD \u2192 <em>domain events<\/em>).<\/li>\n<li><strong>Kontrakty<\/strong> \u2013 OpenAPI\/AsyncAPI, verze a <em>deprecation policy<\/em>, testy kompatibility.<\/li>\n<\/ul>\n<h2>Observabilita a provozn\u00ed metriky<\/h2>\n<ul>\n<li><strong>Lag\/latence<\/strong> \u2013 zpo\u017ed\u011bn\u00ed proti zdroji (CDC lag, watermark).<\/li>\n<li><strong>Pr\u016fchodnost<\/strong> \u2013 zpracovan\u00e9 z\u00e1znamy\/s, velikost batch\u016f, chybovost.<\/li>\n<li><strong>Kvalita<\/strong> \u2013 po\u010dty chyb\u011bj\u00edc\u00edch hodnot, anom\u00e1lie, odchylky od referen\u010dn\u00edch rozd\u011blen\u00ed.<\/li>\n<li><strong>Stabilita<\/strong> \u2013 uptime pipeline, MTTD\/MTTR, saturace front a \u00falo\u017ei\u0161\u0165.<\/li>\n<\/ul>\n<h2>Ekonomika a n\u00e1klady vlastnictv\u00ed<\/h2>\n<ul>\n<li><strong>Compute a storage<\/strong> \u2013 n\u00e1klady na transformace vs. p\u0159esun dat, komprese a tiering.<\/li>\n<li><strong>Datov\u00e9 p\u0159enosy<\/strong> \u2013 egress z cloud\u016f, zpoplatn\u011bn\u00ed dotaz\u016f, optimalizace p\u0159es push-down a <em>predicate pruning<\/em>.<\/li>\n<li><strong>Provozn\u00ed re\u017eie<\/strong> \u2013 monitoring, on-call, rozvoj konektor\u016f, spr\u00e1va sch\u00e9mat.<\/li>\n<li><strong>Licen\u010dn\u00ed modely<\/strong> \u2013 <em>per-core<\/em>, <em>per-connector<\/em>, <em>per-message<\/em>, d\u016fraz na predikovatelnost.<\/li>\n<\/ul>\n<h2>Check-list pro n\u00e1vrh datab\u00e1zov\u00e9 integrace<\/h2>\n<ul>\n<li>Vyjasn\u011bte <strong>latenci<\/strong> (batch\/stream) a po\u017eadovan\u00e9 <strong>SLO<\/strong>.<\/li>\n<li>Zvolte <strong>vzory<\/strong> (CDC, ETL\/ELT, eventy) a <strong>kanonick\u00fd model<\/strong>.<\/li>\n<li>Nastavte <strong>kontrakty sch\u00e9mat<\/strong> a proces verzov\u00e1n\u00ed.<\/li>\n<li>Definujte <strong>DQ pravidla<\/strong>, lineage a katalogizaci dat.<\/li>\n<li>Navrhn\u011bte <strong>bezpe\u010dnost<\/strong> (MFA pro p\u0159\u00edstupy, \u0161ifrov\u00e1n\u00ed, maskov\u00e1n\u00ed, audit).<\/li>\n<li>Dimenzujte <strong>v\u00fdkon<\/strong> (indexy, partitioning, batch size, backpressure).<\/li>\n<li>P\u0159ipravte <strong>testy<\/strong> (kontrakty, syntetick\u00e1 data, rekonstrukce, canary).<\/li>\n<li>Zajist\u011bte <strong>observabilitu<\/strong> (lag, pr\u016fchodnost, kvalita) a runbooky incident\u016f.<\/li>\n<li>Pl\u00e1nujte <strong>migrace a rollback<\/strong> v\u010detn\u011b dual-run a metrik \u00fasp\u011bchu.<\/li>\n<\/ul>\n<h2>Z\u00e1v\u011br<\/h2>\n<p>Datab\u00e1zov\u00e9 integrace jsou kl\u00ed\u010dovou vrstvou modern\u00ed architektury. \u00dasp\u011bch stoj\u00ed na jasn\u00fdch kontraktech, dom\u00e9nov\u00e9m modelu, automatizaci a disciplinovan\u00e9 spr\u00e1v\u011b kvality a bezpe\u010dnosti. Kombinace event-driven p\u0159\u00edstupu s CDC, dob\u0159e \u0159\u00edzen\u00fdm ELT a federovanou spr\u00e1vou dat umo\u017en\u00ed \u0161k\u00e1lovat integrace nap\u0159\u00ed\u010d organizac\u00ed, zachovat integritu i \u010derstvost a sou\u010dasn\u011b udr\u017eet n\u00e1klady a provozn\u00ed rizika pod kontrolou.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Jak spr\u00e1vn\u011b integrovat datab\u00e1ze: n\u00e1vrh sch\u00e9mat, migrace a replikace. Tipy na indexy a optimalizaci dotaz\u016f pro rychl\u00e9 a spolehliv\u00e9 aplikace.<\/p>\n","protected":false},"author":46,"featured_media":84170,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[617],"tags":[1969,1672,1970,1971,1972,1933,1973,1974],"class_list":["post-44170","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-telekomunikacie","tag-databazove-integrace","tag-indexy","tag-migrace","tag-nosql","tag-optimalizace-dotazu","tag-orm","tag-replikace","tag-sql"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Datab\u00e1zov\u00e9 integrace: Propojen\u00ed aplikac\u00ed s datab\u00e1zemi - Auto\u0161koly.sk<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.autoskoly.sk\/news\/databazove-integrace-propojeni-aplikaci-s-databazemi\/\" \/>\n<meta property=\"og:locale\" content=\"sk_SK\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Datab\u00e1zov\u00e9 integrace: Propojen\u00ed aplikac\u00ed s datab\u00e1zemi - Auto\u0161koly.sk\" \/>\n<meta property=\"og:description\" content=\"Jak spr\u00e1vn\u011b integrovat datab\u00e1ze: n\u00e1vrh sch\u00e9mat, migrace a replikace. 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