PostgreSQL

1. 1

   Was ist PostgreSQL

   Relational databaseACIDMVCCPostgres vs MySQL vs SQLiteWhere Postgres shines
   20 Min.
2. 2

   psql und erste Befehle

   Psql command line clientConnecting as postgres userMeta commands like \l \c \dt \d \qSemicolons end statementsMultiline queriesSELECT version()
   25 Min.
3. 3

   Datenbanken und Tabellen erstellen

   CREATE DATABASECREATE TABLEPRIMARY KEYNOT NULLDEFAULTDROP TABLE+1
   30 Min.
4. 4

   Datentypen

   Integer and bigintNumeric vs floatText and varcharBooleanTimestamptz vs timestampDate+3
   25 Min.
5. 5

   SELECT und WHERE

   SELECT specific columnsWHERE with AND ORBETWEENINLIKE and ILIKEIS NULL+2
   30 Min.
6. 6

   Joins

   INNER JOINLEFT JOINRIGHT JOINFULL OUTER JOINSelf joinUSING vs ON
   35 Min.
7. 7

   Aggregate und Gruppierung

   COUNTSUMAVGMINMAXGROUP BY+3
   30 Min.
8. 8

   Indexes

   B-tree defaultCREATE INDEXMulti-column indexPartial index WHERE activeUnique indexWrite cost+1
   35 Min.
9. 9

   Transactions und Isolation

   BEGIN COMMIT ROLLBACKSavepointsREAD COMMITTED defaultREPEATABLE READSERIALIZABLEDirty read non-repeatable read phantom read serialization anomaly
   35 Min.
10. 10

    Functions und Triggers

    CREATE FUNCTIONLANGUAGE plpgsqlRETURNSCREATE TRIGGERBEFORE UPDATENEW and OLD+1
    35 Min.
11. 11

    JSONB und Arrays

    JSONB column-> operator->> operator@> contains operatorGIN index on jsonbText[] and integer[] arrays+2
    35 Min.
12. 12

    EXPLAIN und Query-Optimierung

    EXPLAINEXPLAIN ANALYZESeq scan vs index scan vs index-only scanFixing a missing indexPg_stat_statements overview
    35 Min.
13. 13

    Sichern und Wiederherstellen

    Pg_dump custom formatPg_restorePlain SQL dumpsPoint-in-time recovery overview
    25 Min.
14. 14

    Abschlussprojekt: Ein Schema entwerfen

    Schema designPrimary and foreign keysIndexes on hot columnsUpdated_at triggerJSONB metadataJoins with aggregates+1
    60 Min.

Jede Lektion, jedes Quiz und jede Tutor-Antwort erscheint in deiner Sprache. Der KI-Tutor antwortet in der Sprache, in der du fragst.

See how hiring teams interview engineers on PostgreSQL, in production-like environments.