LessThanOrEqual(SqlString, SqlString) 对两个 SqlString 操作数执行逻辑比较,以确定第一个操作数是否小于或等于第二个操作数。 NotEquals(SqlString, SqlString) 对两个 SqlString 操作数执行逻辑比较,以确定它们是否不相等。 ToSqlBoolean() 将此SqlString 结构转换为 SqlBoolean。 ToSqlByte() 将此SqlStr...
Performs a logical comparison of the two SqlString operands to determine whether the first is greater than or equal to the second.
In a case where you need to search for certain characters as part of the string, you need to escape them when using them in string equals. For example, if you want to search a character such as backslash or a single quote as part of the string, you need to escape it as follows: S...
It turned out that many entries in the table 1 and table 2 had string_field column with NULL values. I thought that JOIN would keep records with NULL values because NULL is equal to NULL, isn’t it? Then I tried: 代码语言:javascript 复制 SELECTNULL=NULL It returns NULL. The solution ...
Explicit(SqlString to SqlDateTime) 将SqlString参数转换为SqlDateTime。 GreaterThan(SqlDateTime, SqlDateTime) 对SqlDateTime的两个实例进行比较,以确定第一个实例是否大于第二个实例。 GreaterThanOrEqual(SqlDateTime, SqlDateTime) 对SqlDateTime的两个实例进行比较,以确定第一个实例是否大于或等于第二个实例。
Compares two strings in a WHERE or HAVING clause or sets a variable or column to string or result of a string operation on the right side of the equation. For example, if a variable @x equals 'Adventure', then WHERE @x = 'Adventure' compares original value of @x is equal to t...
The basic format of a connection string includes a series of keyword/value pairs separated by semicolons. The equal sign (=) connects each keyword and its value. To include values that contain a semicolon, single-quote character, or double-quote character, the value must be enclosed in doub...
<= (Less Than or Equal To) <> (Not Equal To) !< (Not Less Than) != (Not Equal To) !> (Not Greater Than) Compound Logical :: (Scope Resolution) Relational operators String Operator precedence Transactions Variables Queries Statements ...
= QSqlError::NoError) { TurboLog::instance().getConsoleLogger()->error("Table author2:" + daoError.text().toStdString()); } } void insertData() { person p; p.firstName = "王五"; p.lastName = "王五2"; p.birthDate = QDateTime::fromString("1996-04-25", "yyyy-MM-dd");...
"String or binary data would be truncated" and field specifications “Unable to enlist in the transaction” with Oracle linked server from MS SQL Server [<Name of Missing Index, sysname,>] in non clustered index [Execute SQL Task] Error: The value type (__ComObject) can only be converted...