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              • Case study: percentile_cont() and the "68–95–99.7" rule
              • Case study: linear regression on COVID data
                • Download the COVIDcast data
                • Ingest the COVIDcast data
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                  • SQL scripts
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                    • Create xform_to_covidcast_fb_survey_results()
                    • ingest-the-data.sql
                • Analyze the COVIDcast data
                  • symptoms vs mask-wearing by day
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                  • SQL scripts
                    • analysis-queries.sql
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                  • table t1
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              • Case study: analyzing a normal distribution
                • Bucket allocation scheme
                • do_clean_start.sql
                • cr_show_t4.sql
                • cr_dp_views.sql
                • cr_int_views.sql
                • cr_pr_cd_equality_report.sql
                • cr_bucket_using_width_bucket.sql
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                • cr_do_percent_rank.sql
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                • do_populate_results.sql
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                • do_demo.sql
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          • User-defined subprograms and anonymous blocks
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          • Data types
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              • array[] constructor
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                • ANY and ALL
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            • Binary
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            • Date and time
              • Conceptual background
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              • Timezones and UTC offsets
                • Catalog views
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                • Four ways to specify offset
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                    • Helper functions
                • Syntax contexts for offset
                • Recommended practice
              • Typecasting between date-time and text-values
              • Semantics of the date-time data types
                • Date data type
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                    • Ad hoc examples
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                  • Justify() and extract(epoch...)
                  • Interval arithmetic
                    • Interval-interval comparison
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                    • Moment-moment overloads of "-"
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                  • Custom interval domains
                  • Interval utility functions
              • Typecasting between date-time datatypes
              • Operators
                • Test comparison overloads
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                • Test division overloads
              • General-purpose functions
                • Creating date-time values
                • Manipulating date-time values
                • Current date-time moment
                • Delaying execution
                • Miscellaneous
                  • Function age()
                  • Function extract() | date_part()
                  • Implementations that model the overlaps operator
              • Formatting functions
              • Case study: SQL stopwatch
              • Download & install the date-time utilities
            • JSON
              • JSON literals
              • Primitive and compound data types
              • Code example conventions
              • Indexes and check constraints
              • Functions & operators
                • ::jsonb, ::json, ::text (typecast)
                • ->, ->>, #>, #>> (JSON subvalues)
                • - and #- (remove)
                • || (concatenation)
                • = (equality)
                • @> and <@ (containment)
                • ? and ?| and ?& (key or value existence)
                • array_to_json()
                • jsonb_agg()
                • jsonb_array_elements()
                • jsonb_array_elements_text()
                • jsonb_array_length()
                • jsonb_build_object()
                • jsonb_build_array()
                • jsonb_each()
                • jsonb_each_text()
                • jsonb_extract_path()
                • jsonb_extract_path_text() and json_extract_path_text()
                • jsonb_object()
                • jsonb_object_agg()
                • jsonb_object_keys()
                • jsonb_populate_record()
                • jsonb_populate_recordset()
                • jsonb_pretty()
                • jsonb_set() and jsonb_insert()
                • jsonb_strip_nulls()
                • jsonb_to_record()
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                • jsonb_typeof()
                • row_to_json()
                • to_jsonb()
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