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SQL Update
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SQL Select Top
SQL Min and Max
SQL Count, Avg, Sum
SQL Like
SQL Wildcards
SQL In
SQL Between
SQL Aliases
SQL Joins
SQL Inner Join
SQL Left Join
SQL Right Join
SQL Full Join
SQL Self Join
SQL Union
SQL Group By
SQL Having
SQL Exists
SQL Any, All
SQL Select Into
SQL Insert Into Select
SQL Case
SQL Null Functions
SQL Stored Procedures
SQL Comments
SQL Operators
TOP
SQL-Lesson 1. What is SQL? SQL essentials.
What is SQL, basic concepts.
SQL-Lesson 2. Select data from a database (SELECT)
Selection of individual fields from the database.
SQL-Lesson 3. Sorting the result records (ORDER BY)
How to sort the data in the sample.
SQL-Lesson 4. Filter records (WHERE)
Selection of data according to the specified conditions.
SQL-Lesson 5. Using wildcards to search for a specified pattern (LIKE)
Using metacharacters in the data selection condition (% * _ ? [] !).
SQL-Lesson 6. Computed (calculated) columns
Creation of calculated fields in the database.
SQL-Lesson 7. Aggregate functions (MIN, MAX, AVG etc.)
Functions for processing information in the database: COUNT, SUM, MAX, etc.
SQL-Lesson 8. Grouping of the resulting set (GROUP BY)
Getting summary data using grouping (GROUP BY), filtering (HAVING) and sorting (ORDER BY) functions.
SQL-Lesson 9. Subqueries
Advanced data sampling using subqueries.
SQL-Lesson 10. Combining records from two tables (INNER JOIN)
Combination of different tables for further information processing.
SQL-Lesson 11. Outer join (LEFT, RIGHT, FULL JOIN)
Advanced combination of tables using INNER and OUTER JOIN operators.
SQL-Lesson 12. Combining the resulting sets (UNION)
Combined combination of tables using the UNION operator.
SQL-Lesson 13. Insert new records (INSERT INTO)
Adding data to the table using the INSERT statement.
SQL-Lesson 14. Create a new table (CREATE TABLE)
Creating tables using the CREATE TABLE statement.
ONLINE SERVICES
Changing the case of letters in text
The sum is written in Ukrainian
Search for Latin characters in Cyrillic and vice versa
Transliteration from Ukrainian to English
Currency rates
VBA Macros
Functions
CONCATIF
NBU_RATE
GETSUBSTR
SUMINWORDS
TRANSLIT
VLOOKUP2
VLOOKUP3
Procedures
CombineWorkbooks
Division
MergeCell
PasswordRemover
ShowCyrylic
ShowLatin
SortSheets
SQLQuery
UnPivotTable
LESSONS VBA
1. What is VBA, basic concepts.
2. Debugger (Debugger)
3. Working with sheets (Sheets)
4. Working with cells (Ranges)
5. Properties (Properties)
6.1. Data types (Variables)
6.2. Data Types (Continued)
7.1. Conditions (Conditions)
7.2. Terms (Continued)
8.1. Loops (Loops)
8.2. Cycles (Continued)
9. Procedures and functions
10. Dialog boxes
11.1. Workbook Events
11.2. Worksheet Events
12.1. User forms
12.2. Controls (Controls)
12.3. Controls (Continued)
12.4. Controls (Exercises)
13.1. Arrays (Arrays)
13.2. Arrays (Continued)
13.3. Arrays (Exercises)
14.1. Using Excel functions
14.2. Creating a custom function
LESSONS SQL
1. SQL language, basic concepts.
2. Data selection (SELECT)
3. Sorting data (ORDER BY)
4. Data filtering (WHERE)
5. Using metacharacters (LIKE)
6. Calculated (calculated) fields
7. Data processing functions
8. Grouping data (GROUP BY)
9. Subqueries
10. Joining tables (INNER JOIN)
11. OUTER JOIN
12. Combined queries (UNION)
13. Adding data (INSERT INTO)
14. Creating tables (CREATE TABLE)
LESSONS DAX
1. What is DAX. Basic concepts.
2. CALCULATE function
3. Data selection function FILTER
LIBRE OFFICE CALC
Import of exchange rates from the NBU website
Sum written in English
Unpivot tables (Unpivot)
Function
Google Translate
Camel Case Function
Snake Case Function
Kebab Case Function
Break Case Function
Sentence Case Function
Title Case Function
Fuzzy Lookup
Function
GETSUBSTR function
Professional extension "YLC Utilities"
How to create a Python macro
How to write a function in Python
BLOG
What is XML?
What is JSON?
What is refactoring?
What are computer networks? Basic concepts.
How to find out that a user has accessed the site from a mobile device?