在SUBSTR函数中嵌入to_char函数 SQL>select Last_Name, First_Name, substr(to_char(Hire_date, 'MON), 1, 1) the_fist_letter_of_the_month from Employee; 12.转换字符串为日期 语法: to_date(string_value, date_format); SQL>select SYSDATE, to_date('07-04-1976', 'MM-DD-YYYY') from dual...
OF NUMBER INDEX BY PLS_INTEGER; comm_tab commissions; BEGIN -- You can assign values here too wages := (hours_worked * hourly_salary) + bonus; country := 'France'; country := UPPER('Canada'); done := (counter > 100); valid_id := TRUE; emp_rec1.first_name := 'Antonio'; ...
SQL> BEGIN 2 FOR item IN 3 (SELECT (first_name || ' ' || last_name) complete_name 4 FROM employees 5 WHERE ROWNUM < 11 6 ) LOOP 7 DBMS_OUTPUT.PUT_LINE 8 ('Employee name: ' || item.complete_name); 9 END LOOP; 10 END; 11 / Employee name: Ellen Abel Employee name: Sundar...
The second through fourth characters of the code are numbers that represent the letters in the expression. The letters A, E, I, O, U, H, W, and Y are ignored unless they're the first letter of the string. Zeroes are added at the end if necessary to produce a four-character code....
()); } /** * 基于表名确定查询的数据源文件 */ String fileLoc = String.format("./data/%s.csv",table.getName()); /** * 从csv文件中读取指定的字段 */ Reader in = new FileReader(fileLoc); Iterable<CSVRecord> records = CSVFormat.RFC4180.withFirstRecordAsHeader().parse(in); List<...
This logic determines unique disk drives based on the drive letter of the physical file name of each file.Note: Don't use this trace flag unless you know that each file is based on a unique physical disk.Note: Although this trace flag improves the performance of the DBCC CHECKDB commands ...
capitalise the first letter of each word in a string in SQL Server. Capturing the results from exec command Carriage Return...Line Feed...CHAR(10) and CHAR(13) Help CASE Expression in conjunction with LEN(gln.GLNumber) Case expressions may only be nested to level 10. CASE in JOIN CONDIT...
A. Use SUBSTRING with a character string The following example shows how to return only a part of a character string. From thesys.databasestable, this query returns the system database names in the first column, the first letter of the database in the second column, and the third and fou...
When referencing the Unicode character data types nchar, nvarchar, and ntext, 'expression' should be prefixed with the capital letter 'N'. If 'N' isn't specified, SQL Server converts the string to the code page that corresponds to the default collation of the database or column. Any char...
The capital of Sweden is Stockholm. Both words start with the letter 'S'. Show the name and the capital where the first letters of each match. Don't include countries where the name and the capital are the same word. You can use the function LEFT to isolate the first character. You ...