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Reading a JSON Lines File Into a Table With OPENROWSET

October 22, 2013
Pinal Dave
SQL Tips and Tricks
ETL, File format, JSON, SQL Server

Load JSON Lines with OPENROWSET BULK, keep UTF-8 text intact, quarantine invalid objects, and insert validated typed rows.

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UNION vs UNION ALL: Reading the Operators Each One Adds to a Plan

October 19, 2013
Pinal Dave
SQL Performance
Execution Plan, SQL Server, SQL Union clause

Compare UNION vs UNION ALL through actual plans, duplicate-removal operators, memory grants and reads, then prove when branches cannot overlap.

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What Is Replication in SQL Server?

October 16, 2013
Pinal Dave
SQL Tips and Tricks
Best Practices, Database, SQL Backup and Restore, SQL Server

Replication in SQL Server copies chosen tables to other servers and keeps them current. Publisher, distributor and subscriber in plain words, the three kinds, and why replication is not high availability or a backup.

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Bitmap Filters in Parallel Hash Joins: Reading Them in a Plan

October 15, 2013
Pinal Dave
SQL Performance
Execution Plan, Parallel, SQL Joins, SQL Server

Read bitmap filters in parallel hash join plans, compare fact scan output, and distinguish early row rejection from guaranteed savings.

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OPTION (FORCE ORDER): When a Join Order Hint Helps and Hurts

October 12, 2013
Pinal Dave
SQL Performance
Execution Plan, Query Hint, Query Store, SQL Joins, SQL Server

Test OPTION (FORCE ORDER) against real join plans, see when fixed table order helps or hurts, and apply a reversible Query Store hint.

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Horizontal and Vertical Scaling for Databases

October 8, 2013
Pinal Dave
SQL Tips and Tricks
Database, Hardware, SQL High Availability, SQL Server

Horizontal and vertical scaling solve different SQL Server capacity problems; compare larger machines, additional nodes, and the costs each brings.

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Storing JSON in SQL Server

September 29, 2013
Pinal Dave
SQL Tips and Tricks
JSON, SQL Datatype, SQL Index, SQL Server

Storing JSON in SQL Server can use validated nvarchar or the native 2025 json type, with indexed paths and relational columns for stable facts.

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