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        • YSQL
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              • END
              • EXECUTE
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            • WITH clause
              • WITH clause—SQL syntax and semantics
              • Recursive CTE
              • Case study: traversing an employee hierarchy
              • Traversing general graphs
                • Graph representation
                • Common code
                • Undirected cyclic graph
                • Directed cyclic graph
                • Directed acyclic graph
                • Rooted tree
                • Unique containing paths
                • Stress testing find_paths()
              • Case study: Bacon Numbers from IMDb
                • Bacon numbers for synthetic data
                • Bacon numbers for IMDb data
          • Built-in functions and operators
            • Aggregate functions
              • Informal functionality overview
              • Invocation syntax and semantics
              • Grouping sets, rollup, cube
              • Per function signature and purpose
                • avg(), count(), max(), min(), sum()
                • array_agg(), string_agg(), jsonb_agg(), jsonb_object_agg()
                • bit_and(), bit_or(), bool_and(), bool_or()
                • variance(), var_pop(), var_samp(), stddev(), stddev_pop(), stddev_samp()
                • linear regression
                  • covar_pop(), covar_samp(), corr()
                  • regr_%()
                • mode(), percentile_disc(), percentile_cont()
                • rank(), dense_rank(), percent_rank(), cume_dist()
              • 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
                  • Inspect the COVIDcast data
                  • Copy the .csv files to staging tables
                  • Check staged data conforms to the rules
                  • Join the staged data into a single table
                  • SQL scripts
                    • Create cr_staging_tables()
                    • Create cr_copy_from_scripts()
                    • Create assert_assumptions_ok()
                    • Create xform_to_covidcast_fb_survey_results()
                    • ingest-the-data.sql
                • Analyze the COVIDcast data
                  • symptoms vs mask-wearing by day
                  • Data for scatter-plot for 21-Oct-2020
                  • Scatter-plot for 21-Oct-2020
                  • SQL scripts
                    • analysis-queries.sql
                    • synthetic-data.sql
            • currval()
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            • nextval()
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            • Window functions
              • Informal functionality overview
              • Invocation syntax and semantics
              • Per function signature and purpose
                • row_number(), rank() and dense_rank()
                • percent_rank(), cume_dist() and ntile()
                • first_value(), nth_value(), last_value()
                • lag(), lead()
                • Tables for the code examples
                  • table t1
                  • table t2
                  • table t3
                  • table t4
              • 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
                • cr_bucket_dedicated_code.sql
                • do_assert_bucket_ok
                • cr_histogram.sql
                • cr_do_ntile.sql
                • cr_do_percent_rank.sql
                • cr_do_cume_dist.sql
                • do_populate_results.sql
                • do_report_results.sql
                • do_compare_dp_results.sql
                • do_demo.sql
                • Reports
                  • Histogram report
                  • dp-results
                  • compare-dp-results
                  • int-results
            • yb_hash_code()
            • yb_is_local_table()
          • User-defined subprograms and anonymous blocks
            • Subprogram attributes
              • «Depends on extension» semantics
              • Alterable common attributes
              • Alterable function-only attributes
                • Immutable function examples
            • Resolution of unqualified names
            • Subprogram overloading
            • PL/pgSQL's execution model
            • The «pg_proc» catalog table
          • Data types
            • Array
              • array[] constructor
              • Literals
                • Text typecasting and literals
                • Array of primitive values
                • Row
                • Array of rows
              • FOREACH loop (PL/pgSQL)
              • array of DOMAINs
              • Functions and operators
                • ANY and ALL
                • Array comparison
                • Array slice operator
                • Array concatenation
                • Array properties
                • array_agg(), unnest(), generate_subscripts()
                • array_fill()
                • array_position(), array_positions()
                • array_remove()
                • array_replace() / set value
                • array_to_string()
                • string_to_array()
            • Binary
            • Boolean
            • Character
            • Date and time
              • Conceptual background
              • Section contents
              • Timezones and UTC offsets
                • Catalog views
                • Extended_timezone_names
                  • Unrestricted full projection
                  • Real timezones with DST
                  • Real timezones no DST
                  • Synthetic timezones no DST
                • Offset/timezone-sensitive operations
                  • Timestamptz to/from timestamp conversion
                  • Pure 'day' interval arithmetic
                • Four ways to specify offset
                  • Name-resolution rules
                    • 1 case-insensitive resolution
                    • 2 ~names.abbrev never searched
                    • 3 'set timezone' string not resolved in ~abbrevs.abbrev
                    • 4 ~abbrevs.abbrev before ~names.name
                    • 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
                • Time data type
                • Plain timestamp and timestamptz
                • Interval data type
                  • Interval representation
                    • Ad hoc examples
                    • Representation model
                  • Interval value limits
                  • Declaring intervals
                  • Justify() and extract(epoch...)
                  • Interval arithmetic
                    • Interval-interval comparison
                    • Interval-interval addition and subtraction
                    • Interval-number multiplication
                    • Moment-moment overloads of "-"
                    • Moment-interval overloads of "+" and "-"
                  • Custom interval domains
                  • Interval utility functions
              • Typecasting between date-time datatypes
              • Operators
                • Test comparison overloads
                • Test addition overloads
                • Test subtraction overloads
                • Test multiplication overloads
                • 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()
                • jsonb_to_recordset()
                • jsonb_typeof()
                • row_to_json()
                • to_jsonb()
            • Money
            • Numeric
            • Range
            • Serial
            • UUID
          • Keywords
          • Reserved names
      • CLIs
        • ysqlsh
        • ycqlsh
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        • ysql_dump
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      • Drivers and ORMs
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      • Third party tools
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      • Sample datasets
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