cotangent of 30 degrees

-- Sentence skill -- Data Operations SELECT -- retrieve data rows and columns from database tables INSERT -- add new data rows to the database table DELETE -- DELETE data rows from a database table UPDATE -- UPDATE data in the database table -- Data

  -- Sentence skill 1. Data OperationsSelect -- retrieve data rows and columns from database tablesInsert -- add new data rows to the database tableDelete -- delete data rows from a database tableUpdate -- update data in the database table 2.

Comparison of common functions for SQL Server to Oracle 1. Absolute ValueS: Select ABS (-1) ValueO: Select ABS (-1) value from dual 2. INTEGER (large)S: Select ceiling (-1.001) ValueO: Select Ceil (-1.001) value from dual 3. Round (small)S: Select

Introduction to the formula of sin function Grammar: SIN (number) Number is the angle, in radians, that requires a sine. Note: If the unit of the parameter is degrees, you can multiply PI ()/180 or use the RADIANS function to convert it to

******************** -- Sentence skill -- Data Operations SELECT -- retrieve data rows and columns from database tables INSERT -- add new data rows to the database table DELETE -- DELETE data rows from a database table UPDATE -- UPDATE data in the

Transact_ SQL small manual ******************** -- Sentence skill -- Data Operations Select -- retrieve data rows and columns from database tables Insert -- add new data rows to the database table Delete -- delete data rows from a

Common SQL Syntax Functions Code:Functions of Transact SQL statements-- Data OperationsSELECT -- retrieve data rows and columns from database tablesINSERT -- add new data rows to the database tableDELETE -- DELETE data rows from a database

  Basic SQL knowledge1. database query: Select usageSelect [top (numeric)] field list from data table [Where condition] [order by field] [ASC or DESC] 2. Add data: insert into usageInsert into data table (Field 1, Field 2, Field 3 ,...) Values

Sentence skill-- Data Operations Select -- retrieve data rows and columns from database tables Insert -- add new data rows to the database table Delete -- delete data rows from a database table Update -- update data in the database table --

The Code is as follows: DROPTABLE data table name (permanently delete a data table) delete record: deletefrom table name where condition (rqjs_id ***) update all records: update table name set field name value update by condition: update table name