PostgreSQL
Apprendre PostgreSQL de bout en bout. Bases du SQL, jointures, index, transactions, JSONB, EXPLAIN et conception de schémas.
14 leçons, dans l’ordre
- 120 min
Qu'est-ce que PostgreSQL
Relational databaseACIDMVCCPostgres vs MySQL vs SQLiteWhere Postgres shines - 225 min
psql et premières commandes
Psql command line clientConnecting as postgres userMeta commands like \l \c \dt \d \qSemicolons end statementsMultiline queriesSELECT version() - 330 min
Création de bases de données et de tables
CREATE DATABASECREATE TABLEPRIMARY KEYNOT NULLDEFAULTDROP TABLE+1 - 425 min
Types de données
Integer and bigintNumeric vs floatText and varcharBooleanTimestamptz vs timestampDate+3 - 530 min
SELECT et WHERE
SELECT specific columnsWHERE with AND ORBETWEENINLIKE and ILIKEIS NULL+2 - 635 min
Joins
INNER JOINLEFT JOINRIGHT JOINFULL OUTER JOINSelf joinUSING vs ON - 730 min
Agrégats et regroupement
COUNTSUMAVGMINMAXGROUP BY+3 - 835 min
Index
B-tree defaultCREATE INDEXMulti-column indexPartial index WHERE activeUnique indexWrite cost+1 - 935 min
Transactions et Isolation
BEGIN COMMIT ROLLBACKSavepointsREAD COMMITTED defaultREPEATABLE READSERIALIZABLEDirty read non-repeatable read phantom read serialization anomaly - 1035 min
Functions et Triggers
CREATE FUNCTIONLANGUAGE plpgsqlRETURNSCREATE TRIGGERBEFORE UPDATENEW and OLD+1 - 1135 min
JSONB et tableaux
JSONB column-> operator->> operator@> contains operatorGIN index on jsonbText[] and integer[] arrays+2 - 1235 min
EXPLAIN et optimisation des requetes
EXPLAINEXPLAIN ANALYZESeq scan vs index scan vs index-only scanFixing a missing indexPg_stat_statements overview - 1325 min
Sauvegarde et restauration
Pg_dump custom formatPg_restorePlain SQL dumpsPoint-in-time recovery overview - 1460 min
Projet final : Concevoir un schéma
Schema designPrimary and foreign keysIndexes on hot columnsUpdated_at triggerJSONB metadataJoins with aggregates+1
Apprenez PostgreSQL dans votre langue
Chaque leçon, quiz et réponse du tuteur s’affiche dans votre langue. Le tuteur IA répond dans la langue que vous utilisez.
Roles that use PostgreSQL
See how hiring teams interview engineers on PostgreSQL, in production-like environments.
Database Administrator (DBA)
Hire DBAs in real workspaces with PostgreSQL or MySQL, real replication lag, real slow queries and real backups to restore. Live or take-home.
See the interviewBackend Engineer (Go, Rust, Java)
Hire backend engineers in real services with real databases, real concurrency and real latency budgets. Live or take-home, fully recorded.
See the interviewData Engineer
Hire data engineers in workspaces with real Spark, dbt and Airflow pipelines. Schema drift, bad data and reruns included.
See the interview