PostgreSQL

1. 1

   What is PostgreSQL

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

   psql and First Commands

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

   Creating Databases and Tables

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

   Data Types

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

   SELECT and 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

   Aggregates and Grouping

   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 and Isolation

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

    Functions and Triggers

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

    JSONB and Arrays

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

    EXPLAIN and Query Tuning

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

    Backup and Restore

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

    Capstone: Design a Schema

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

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