Added benchmarks scripts with small instruction

docs/benchmarks-scripts/mssql/mssql-script.md

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+# How to use MsSQL Script?
+
+In order to create a database with a certain number of tables, and a certain number of records in each of them, 
+you need to follow a few simple steps.
+
+1. Create a new database.
+2. In the **mssql-script.sql** file, you need to change a few points to create the required number of tables and records in them.
+   1. Change the value for the number of tables.
+
+      ![](images/table_count_mssql.png)
+   2. You can add records of different sizes to the table - 50 bytes, 500 bytes, 10 kilobytes, and 100 kilobytes. To do this, 
+   you need to specify the number of records for each size.
+
+      ![](images/rows_count_mssql.png)
+3. Execute the script with your changes for the new database. After the script finishes its work, you will receive the number of tables specified in the script, with names starting with **test_0** and ending with **test_(the number of tables minus 1)**.
+
+

docs/benchmarks-scripts/mysql/mysql-script.md

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+# How to use MySQL Script?
+
+In order to create a database with a certain number of tables, and a certain number of records in each of them, 
+you need to follow a few simple steps.
+
+1. Create a new database.
+2. In the **mysql-script.sql** file, you need to change a few points to create the required number of tables and records in them.
+   1. Change the value for the number of tables.
+
+      ![](images/table_count_mysql.png)
+   2. You can add records of different sizes to the table - 50 bytes, 500 bytes, 10 kilobytes, and 100 kilobytes. To do this, 
+   you need to specify the number of records for each size.
+
+      ![](images/rows_count_mysql.png)
+3. Execute the script with your changes for the new database. After the script finishes its work, you will receive the number of tables specified in the script, with names starting with **test_0** and ending with **test_(the number of tables minus 1)**.
+
+

docs/benchmarks-scripts/postgres/1-create-copy-tables-procedure.sql

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+create or replace procedure copy_table(tablecount int)
+language plpgsql
+as $$
+declare v_max_table int; v_counter_table int; v_tnamee VARCHAR(255);
+begin
+	v_max_table := tablecount;
+	v_counter_table := 1;
+    while v_counter_table < v_max_table loop
+      EXECUTE format('create table test_%s as (select * from test t)', v_counter_table);
+	  v_counter_table := v_counter_table + 1;
+   end loop;
+    commit;
+end;$$
+

docs/benchmarks-scripts/postgres/2-create-insert-rows-to-table-procedure.sql

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+create or replace procedure insert_rows(allrows int, insertcount int, value text)
+language plpgsql
+as $$
+declare dummyIpsum varchar(255); fieldText text; vmax int; vmaxx int; vmaxoneinsert int; counter int;
+declare lastinsertcounter int; lastinsert int; fullloop int; fullloopcounter int; insertTable text; insertTableLasted text;
+
+begin
+	fieldText := value;
+	dummyIpsum = '''dummy_ipsum''';
+	vmax = allrows;
+	vmaxx = allrows;
+	vmaxoneinsert = insertcount;
+	counter = 0;
+	lastinsertcounter = 0;
+	lastinsert = 0;
+	fullloop = 0;
+	fullloopcounter = 0;
+
+	while vmaxx < vmaxoneinsert loop
+      vmaxoneinsert := vmaxx;
+	  fullloop := fullloop + 1;
+   	end loop;
+    commit;
+
+   	while vmax > vmaxoneinsert loop
+      fullloop := fullloop + 1;
+	  vmax := vmax - vmaxoneinsert;
+	 lastinsert := vmax;
+   	end loop;
+    commit;
+
+   insertTable := 'insert into test (varchar1, varchar2, varchar3, varchar4, varchar5, longblobfield, timestampfield) values (';
+	while counter < vmaxoneinsert loop
+      insertTable := concat(insertTable, dummyIpsum, ', ', dummyIpsum, ', ', dummyIpsum, ', ', dummyIpsum, ', ', dummyIpsum, ', ', fieldText, ', CURRENT_TIMESTAMP), (');
+	  counter := counter + 1;
+   	end loop;
+    commit;
+	insertTable := concat(insertTable, dummyIpsum, ', ', dummyIpsum, ', ', dummyIpsum, ', ', dummyIpsum, ', ', dummyIpsum, ', ', fieldText, ', CURRENT_TIMESTAMP);');
+
+	while vmax < 1 loop
+      fullloop := 0;
+	  vmax := 1;
+   	end loop;
+    commit;
+
+   while fullloopcounter < fullloop loop
+      EXECUTE insertTable;
+	  fullloopcounter := fullloopcounter + 1;
+   	end loop;
+    commit;
+
+   insertTableLasted := 'insert into test (varchar1, varchar2, varchar3, varchar4, varchar5, longblobfield, timestampfield) values (';
+	while lastinsertcounter < lastinsert loop
+      insertTableLasted := concat(insertTableLasted, dummyIpsum, ', ', dummyIpsum, ', ', dummyIpsum, ', ', dummyIpsum, ', ', dummyIpsum, ', ', fieldText, ', CURRENT_TIMESTAMP), (');
+      lastinsertcounter := lastinsertcounter + 1;
+   	end loop;
+    commit;
+	insertTableLasted := concat(insertTableLasted, dummyIpsum, ', ', dummyIpsum, ', ', dummyIpsum, ', ', dummyIpsum, ', ', dummyIpsum, ', ', fieldText, ', CURRENT_TIMESTAMP);');
+
+	while lastinsert > 0 loop
+      EXECUTE insertTableLasted;
+	  lastinsert := 0;
+   	end loop;
+    commit;
+end;$$
+
+

docs/benchmarks-scripts/postgres/postgres-script.md

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+# How to use Postgres Script?
+
+In order to create a database with a certain number of tables, and a certain number of records in each of them, 
+you need to follow a few simple steps.
+
+1. Create a new database.
+2. On the new database, run script **1-create-copy-tables-procedure.sql** to create the table copy procedure.
+3. Run script **2-create-insert-rows-to-table-procedure.sql** to create a procedure for creating a table with the specified number of records.
+4. In the **3-run-script.sql** file, you need to change a few points to create the required number of tables and records in them.
+   1. Change the value for the number of tables.
+
+      ![](images/table_count_postgres.png)
+   2. You can add records of different sizes to the table - 50 bytes, 500 bytes, 10 kilobytes, and 100 kilobytes. To do this, 
+   you need to specify the number of records for each size.
+
+      ![](images/rows_count_postgres.png)
+5. Execute the **3-run-script.sql** script with your changes for the new database. After the script finishes its work, you will receive the number of tables specified in the script, with names starting with **test_0** and ending with **test_(the number of tables minus 1)**.
+
+